Iowa (IA) — Statewide

Iowa (IA) — Statewide

Interactive Chart

1864 2024
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Iowa (IA) — Total Data

YearDRMargin (D%, R%, 3rd%)D Cand.R Cand.State MarginNat. MarginRel. MarginTotal votesSourceEVs
186449,525(35.9%)88,500(64.1%)(35.9%, 64.1%, 0.0%)George B. McClellanAbraham LincolnR+28.2R+10.1R+18.2138,025Wikipedia8
186874,040(38.1%)(Δ 24,515)120,399(61.9%)(Δ 31,899)(38.1%, 61.9%, 0.0%)Horatio SeymourUlysses S. GrantR+23.8(Δ D+4.4)R+5.3(Δ D+4.8)R+18.5(Δ R+0.4)194,439(Δ 56,414)Wikipedia8
187281,636(37.9%)(Δ 7,596)131,566(61.1%)(Δ 11,167)(37.7%, 60.8%, 1.0%)Horace GreeleyUlysses S. GrantR+23.1(Δ D+0.8)R+11.8(Δ R+6.5)R+11.3(Δ D+7.2)216,365(Δ 21,926)Wikipedia11
1876112,121(38.3%)(Δ 30,485)171,326(58.5%)(Δ 39,760)(38.3%, 58.5%, 3.2%)Samuel J. TildenRutherford B. HayesR+20.2(Δ D+2.9)D+3.0(Δ D+14.8)R+23.2(Δ R+11.9)292,878(Δ 76,513)Wikipedia11
1880105,845(32.8%)(Δ -6,276)183,927(57.0%)(Δ 12,601)(32.7%, 56.9%, 10.1%)Winfield Scott HancockJames A. GarfieldR+24.1(Δ R+3.9)R+0.1(Δ R+3.1)R+24.0(Δ R+0.8)323,498(Δ 30,620)Wikipedia11
1884177,316(47.2%)(Δ 71,471)197,089(52.4%)(Δ 13,162)(47.0%, 52.3%, 0.4%)Grover ClevelandJames G. BlaineR+5.2(Δ D+18.9)D+0.6(Δ D+0.7)R+5.8(Δ D+18.2)377,201(Δ 53,703)Wikipedia13
1888179,877(44.9%)(Δ 2,561)211,603(52.8%)(Δ 14,514)(44.5%, 52.4%, 2.3%)Grover ClevelandBenjamin HarrisonR+7.9(Δ R+2.6)D+0.8(Δ D+0.3)R+8.7(Δ R+2.9)404,135(Δ 26,934)Wikipedia13
1892196,367(45.0%)(Δ 16,490)219,795(50.3%)(Δ 8,192)(44.3%, 49.6%, 4.6%)Grover ClevelandBenjamin HarrisonR+5.3(Δ D+2.6)D+3.0(Δ D+2.2)R+8.3(Δ D+0.4)443,159(Δ 39,024)Wikipedia13
1896223,741(43.2%)(Δ 27,374)289,293(55.9%)(Δ 69,498)(42.9%, 55.5%, 0.9%)William Jennings BryanWilliam McKinleyR+12.6(Δ R+7.3)R+4.3(Δ R+7.3)R+8.3(Δ D+0.0)521,547(Δ 78,388)Wikipedia13
1900209,265(39.7%)(Δ -14,476)307,808(58.5%)(Δ 18,515)(39.5%, 58.0%, 1.8%)William Jennings BryanWilliam McKinleyR+18.6(Δ R+6.0)R+6.1(Δ R+1.8)R+12.5(Δ R+4.2)530,355(Δ 8,808)Wikipedia13
1904149,276(31.6%)(Δ -59,989)308,158(65.2%)(Δ 350)(30.7%, 63.4%, 3.1%)Alton B. ParkerTheodore RooseveltR+32.7(Δ R+14.1)R+18.8(Δ R+12.7)R+13.9(Δ R+1.4)486,093(Δ -44,262)Wikipedia13
1908200,771(41.3%)(Δ 51,495)275,209(56.6%)(Δ -32,949)(40.6%, 55.6%, 2.0%)William Jennings BryanWilliam Howard TaftR+15.0(Δ D+17.6)R+8.5(Δ D+10.3)R+6.5(Δ D+7.3)494,769(Δ 8,676)Wikipedia13
1912185,325(39.7%)(Δ -15,446)161,819(34.7%)(Δ -113,390)(37.6%, 32.9%, 24.3%)Woodrow WilsonTheodore RooseveltD+4.8(Δ D+19.8)D+14.4(Δ D+23.0)R+9.7(Δ R+3.2)492,356(Δ -2,413)Wikipedia13
1916218,699(42.9%)(Δ 33,374)280,439(55.0%)(Δ 118,620)(42.6%, 54.6%, 2.1%)Woodrow WilsonCharles Evans HughesR+12.0(Δ R+16.8)D+3.1(Δ R+11.3)R+15.1(Δ R+5.5)513,942(Δ 21,586)Wikipedia13
1920227,921(25.9%)(Δ 9,222)634,674(72.2%)(Δ 354,235)(25.5%, 70.9%, 1.9%)James M. CoxWarren G. HardingR+45.4(Δ R+33.4)R+26.2(Δ R+29.3)R+19.3(Δ R+4.1)895,082(Δ 381,140)Wikipedia13
1924162,600(16.7%)(Δ -65,321)537,635(55.3%)(Δ -97,039)(16.6%, 55.0%, 27.9%)John W. DavisCalvin CoolidgeR+38.4(Δ D+7.1)R+25.2(Δ D+1.0)R+13.2(Δ D+6.1)976,960(Δ 81,878)Wikipedia13
1928379,311(37.7%)(Δ 216,711)623,570(62.0%)(Δ 85,935)(37.6%, 61.8%, 0.3%)Al SmithHerbert HooverR+24.2(Δ D+14.2)R+17.4(Δ D+7.8)R+6.8(Δ D+6.4)1,009,489(Δ 32,529)Wikipedia13
1932598,019(57.9%)(Δ 218,708)414,433(40.1%)(Δ -209,137)(57.7%, 40.0%, 2.0%)Franklin D. RooseveltHerbert HooverD+17.7(Δ D+41.9)D+17.8(Δ D+35.2)R+0.1(Δ D+6.7)1,036,687(Δ 27,198)Wikipedia11
1936621,756(54.6%)(Δ 23,737)487,977(42.8%)(Δ 73,544)(54.4%, 42.7%, 2.6%)Franklin D. RooseveltAlf LandonD+11.7(Δ R+6.0)D+24.3(Δ D+6.5)R+12.5(Δ R+12.5)1,142,733(Δ 106,046)Wikipedia11
1940578,800(47.8%)(Δ -42,956)632,370(52.2%)(Δ 144,393)(47.6%, 52.0%, 0.0%)Franklin D. RooseveltWendell WillkieR+4.4(Δ R+16.1)D+10.0(Δ R+14.3)R+14.4(Δ R+1.8)1,215,430(Δ 72,697)Wikipedia11
1944499,876(47.7%)(Δ -78,924)547,267(52.2%)(Δ -85,103)(47.5%, 52.0%, 0.1%)Franklin D. RooseveltThomas E. DeweyR+4.5(Δ R+0.1)D+7.5(Δ R+2.5)R+12.0(Δ D+2.4)1,052,599(Δ -162,831)Wikipedia10
1948522,380(50.8%)(Δ 22,504)494,018(48.0%)(Δ -53,249)(50.3%, 47.6%, 1.2%)Harry S. TrumanThomas E. DeweyD+2.7(Δ D+7.2)D+4.5(Δ R+3.0)R+1.8(Δ D+10.2)1,038,264(Δ -14,335)Wikipedia10
1952451,513(35.7%)(Δ -70,867)808,906(63.9%)(Δ 314,888)(35.6%, 63.8%, 0.4%)Adlai StevensonDwight D. EisenhowerR+28.2(Δ R+30.9)R+10.9(Δ R+15.3)R+17.3(Δ R+15.6)1,268,773(Δ 230,509)Wikipedia10
1956501,858(40.7%)(Δ 50,345)729,187(59.1%)(Δ -79,719)(40.7%, 59.1%, 0.3%)Adlai StevensonDwight D. EisenhowerR+18.4(Δ D+9.8)R+15.4(Δ R+4.5)R+3.0(Δ D+14.3)1,234,564(Δ -34,209)Wikipedia10
1960550,565(43.2%)(Δ 48,707)722,381(56.7%)(Δ -6,806)(43.2%, 56.7%, 0.0%)John F. KennedyRichard NixonR+13.5(Δ D+4.9)D+0.2(Δ D+15.6)R+13.7(Δ R+10.6)1,273,810(Δ 39,246)Wikipedia10
1964733,030(62.0%)(Δ 182,465)449,148(38.0%)(Δ -273,233)(61.9%, 37.9%, 0.0%)Lyndon B. JohnsonBarry GoldwaterD+24.0(Δ D+37.5)D+22.6(Δ D+22.4)D+1.4(Δ D+15.0)1,184,539(Δ -89,271)Wikipedia9
1968476,699(41.0%)(Δ -256,331)619,106(53.3%)(Δ 169,958)(40.8%, 53.0%, 5.7%)Hubert HumphreyRichard NixonR+12.2(Δ R+36.2)R+0.7(Δ R+23.3)R+11.5(Δ R+12.9)1,167,931(Δ -16,608)Wikipedia9
1972496,206(40.5%)(Δ 19,507)706,207(57.7%)(Δ 87,101)(40.5%, 57.6%, 1.8%)George McGovernRichard NixonR+17.1(Δ R+4.9)R+23.1(Δ R+22.4)D+6.0(Δ D+17.5)1,225,944(Δ 58,013)Wikipedia8
1976619,931(48.7%)(Δ 123,725)632,863(49.7%)(Δ -73,344)(48.5%, 49.5%, 1.6%)Jimmy CarterGerald FordR+1.0(Δ D+16.1)D+2.1(Δ D+25.2)R+3.1(Δ R+9.1)1,279,306(Δ 53,362)Wikipedia8
1980508,672(39.1%)(Δ -111,259)676,026(52.0%)(Δ 43,163)(38.6%, 51.3%, 8.8%)Jimmy CarterRonald ReaganR+12.7(Δ R+11.7)R+9.7(Δ R+11.8)R+3.0(Δ D+0.1)1,317,661(Δ 38,355)Wikipedia8
1984605,620(46.2%)(Δ 96,948)703,088(53.6%)(Δ 27,062)(45.9%, 53.3%, 0.1%)Walter MondaleRonald ReaganR+7.4(Δ D+5.3)R+18.2(Δ R+8.5)D+10.8(Δ D+13.8)1,319,805(Δ 2,144)Wikipedia8
1988670,557(55.0%)(Δ 64,937)545,355(44.8%)(Δ -157,733)(54.7%, 44.5%, 0.2%)Michael DukakisGeorge H.W. BushD+10.2(Δ D+17.6)R+7.7(Δ D+10.5)D+17.9(Δ D+7.1)1,225,614(Δ -94,191)Wikipedia8
1992586,353(43.6%)(Δ -84,204)504,891(37.5%)(Δ -40,464)(43.3%, 37.3%, 18.7%)Bill ClintonGeorge H.W. BushD+6.0(Δ R+4.2)D+5.6(Δ D+13.3)D+0.5(Δ R+17.5)1,354,607(Δ 128,993)Wikipedia7
1996620,258(50.9%)(Δ 33,905)492,644(40.4%)(Δ -12,247)(50.3%, 39.9%, 8.5%)Bill ClintonBob DoleD+10.3(Δ D+4.3)D+8.5(Δ D+3.0)D+1.8(Δ D+1.4)1,234,075(Δ -120,532)Wikipedia7
2000638,517(49.0%)(Δ 18,259)634,373(48.7%)(Δ 141,729)(48.5%, 48.2%, 2.2%)Al GoreGeorge W. BushD+0.3(Δ R+10.0)D+0.5(Δ R+8.0)R+0.2(Δ R+2.0)1,315,563(Δ 81,488)Wikipedia7
2004741,898(49.5%)(Δ 103,381)751,957(50.1%)(Δ 117,584)(49.2%, 49.9%, 0.4%)John KerryGeorge W. BushR+0.7(Δ R+1.0)R+2.5(Δ R+3.0)D+1.8(Δ D+2.0)1,506,908(Δ 191,345)Wikipedia7
2008828,940(54.6%)(Δ 87,042)682,379(44.9%)(Δ -69,578)(53.9%, 44.4%, 0.5%)Barack ObamaJohn McCainD+9.5(Δ D+10.2)D+7.3(Δ D+9.7)D+2.3(Δ D+0.5)1,537,123(Δ 30,215)Wikipedia7
2012822,544(52.5%)(Δ -6,396)730,617(46.7%)(Δ 48,238)(52.0%, 46.2%, 0.8%)Barack ObamaMitt RomneyD+5.8(Δ R+3.7)D+3.9(Δ R+3.4)D+2.0(Δ R+0.3)1,582,180(Δ 45,057)Wikipedia6
2016653,669(43.2%)(Δ -168,875)800,983(52.9%)(Δ 70,366)(41.7%, 51.1%, 3.8%)Hillary ClintonDonald TrumpR+9.4(Δ R+15.2)D+2.1(Δ R+1.8)R+11.5(Δ R+13.5)1,566,031(Δ -16,149)Wikipedia6
2020759,061(45.3%)(Δ 105,392)897,672(53.5%)(Δ 96,689)(44.9%, 53.1%, 1.2%)Joe BidenDonald TrumpR+8.2(Δ D+1.2)D+4.5(Δ D+2.4)R+12.7(Δ R+1.1)1,690,871(Δ 124,840)Wikipedia6
2024707,278(42.9%)(Δ -51,783)927,019(56.3%)(Δ 29,347)(42.5%, 55.7%, 0.8%)Kamala HarrisDonald TrumpR+13.2(Δ R+5.0)R+1.5(Δ R+5.9)R+11.7(Δ D+0.9)1,663,506(Δ -27,365)Wikipedia6

Column explanations

Δ
Change (delta) in the value from the previous election year.
Year
Election year.
D
Number of votes for the Democratic candidate (raw count(pct%)).
R
Number of votes for the Republican candidate (raw count(pct%)).
Margin (D%, R%, 3rd%)
Vote share breakdown showing Democratic %, Republican %, and top third-party % in format (D%, R%, 3rd%).
D Cand.
Name of the Democratic candidate.
R Cand.
Name of the Republican candidate.
State Margin
Margin between the two major-party candidates, including third-party votes ((D - R)/total).
Nat. Margin
The national presidential margin for that year, including third-party votes ((D_total - R_total)/total_votes).
Rel. Margin
The presidential margin relative to the national presidential margin (Margin - Nat. Margin).
Total votes
Total voter turnout or ballots cast (when provided).
Source
URL of the source for this data (usually Wikipedia).
EVs
Number of electoral votes allocated to this state or unit.

Iowa (IA) — Third-Party Data

YearDRMargin (D%, R%, 3rd%)Other votesTop 3rd-Party CandidateTop 3rd-Party ShareTotal 3rd-Party VotesState 3rd-Party Share3rd-Party Nat. Share3rd-Party Rel. Share
186449,525(35.9%)88,500(64.1%)(35.9%, 64.1%, 0.0%)0(0.0%)None0.00%00.00%0.02%-0.02%
186874,040(38.1%)(Δ 24,515)120,399(61.9%)(Δ 31,899)(38.1%, 61.9%, 0.0%)0(0.0%)None0.00%00.00%0.00%0.00%
187281,636(37.9%)(Δ 7,596)131,566(61.1%)(Δ 11,167)(37.7%, 60.8%, 1.0%)2,221(1.0%)Charles O'Conor1.03%3,1631.46%0.63%0.83%
1876112,121(38.3%)(Δ 30,485)171,326(58.5%)(Δ 39,760)(38.3%, 58.5%, 3.2%)9,431(3.2%)Peter Cooper3.22%9,4313.22%1.16%2.06%
1880105,845(32.8%)(Δ -6,276)183,927(57.0%)(Δ 12,601)(32.7%, 56.9%, 10.1%)32,701(10.1%)James Weaver10.11%33,72610.43%3.47%6.95%
1884177,316(47.2%)(Δ 71,471)197,089(52.4%)(Δ 13,162)(47.0%, 52.3%, 0.4%)1,499(0.4%)John St. John0.40%2,7960.74%2.87%-2.13%
1888179,877(44.9%)(Δ 2,561)211,603(52.8%)(Δ 14,514)(44.5%, 52.4%, 2.3%)9,105(2.3%)Alson Streeter2.25%12,6553.13%3.57%-0.44%
1892196,367(45.0%)(Δ 16,490)219,795(50.3%)(Δ 8,192)(44.3%, 49.6%, 4.6%)20,595(4.7%)James Weaver4.65%26,9976.09%10.97%-4.87%
1896223,741(43.2%)(Δ 27,374)289,293(55.9%)(Δ 69,498)(42.9%, 55.5%, 0.9%)4,516(0.9%)John Palmer0.87%8,5131.63%2.27%-0.63%
1900209,265(39.7%)(Δ -14,476)307,808(58.5%)(Δ 18,515)(39.5%, 58.0%, 1.8%)9,502(1.8%)John Woolley1.79%13,2822.50%2.84%-0.34%
1904149,276(31.6%)(Δ -59,989)308,158(65.2%)(Δ 350)(30.7%, 63.4%, 3.1%)14,849(3.1%)Eugene V. Debs3.05%28,6595.90%5.99%-0.10%
1908200,771(41.3%)(Δ 51,495)275,209(56.6%)(Δ -32,949)(40.6%, 55.6%, 2.0%)9,837(2.0%)Eugene Chafin1.99%18,7893.80%5.39%-1.59%
1912185,325(39.7%)(Δ -15,446)161,819(34.7%)(Δ -113,390)(37.6%, 32.9%, 24.3%)119,805(25.7%)William H. Taft24.33%145,21229.49%30.74%-1.25%
1916218,699(42.9%)(Δ 33,374)280,439(55.0%)(Δ 118,620)(42.6%, 54.6%, 2.1%)10,973(2.2%)Allan Benson2.14%14,8042.88%4.64%-1.76%
1920227,921(25.9%)(Δ 9,222)634,674(72.2%)(Δ 354,235)(25.5%, 70.9%, 1.9%)16,981(1.9%)Eugene Debs1.90%32,4873.63%5.53%-1.91%
1924162,600(16.7%)(Δ -65,321)537,635(55.3%)(Δ -97,039)(16.6%, 55.0%, 27.9%)272,243(28.0%)Robert La Follette27.87%276,72528.33%17.14%11.19%
1928379,311(37.7%)(Δ 216,711)623,570(62.0%)(Δ 85,935)(37.6%, 61.8%, 0.3%)2,960(0.3%)Norman Thomas0.29%6,6080.65%0.99%-0.34%
1932598,019(57.9%)(Δ 218,708)414,433(40.1%)(Δ -209,137)(57.7%, 40.0%, 2.0%)20,467(2.0%)Thomas/Maurer1.97%24,2352.34%2.94%-0.60%
1936621,756(54.6%)(Δ 23,737)487,977(42.8%)(Δ 73,544)(54.4%, 42.7%, 2.6%)29,687(2.6%)William Lemke2.60%33,0002.89%2.66%0.23%
1940578,800(47.8%)(Δ -42,956)632,370(52.2%)(Δ 144,393)(47.6%, 52.0%, 0.0%)0(0.0%)None0.00%4,2600.35%0.48%-0.13%
1944499,876(47.7%)(Δ -78,924)547,267(52.2%)(Δ -85,103)(47.5%, 52.0%, 0.1%)1,511(0.1%)Norman Thomas0.14%5,4560.52%0.72%-0.20%
1948522,380(50.8%)(Δ 22,504)494,018(48.0%)(Δ -53,249)(50.3%, 47.6%, 1.2%)12,125(1.2%)Henry Wallace1.17%21,8662.11%5.38%-3.27%
1952451,513(35.7%)(Δ -70,867)808,906(63.9%)(Δ 314,888)(35.6%, 63.8%, 0.4%)5,085(0.4%)Vincent Hallinan0.40%8,3540.66%0.49%0.17%
1956501,858(40.7%)(Δ 50,345)729,187(59.1%)(Δ -79,719)(40.7%, 59.1%, 0.3%)3,202(0.3%)Unpledged Electors0.26%3,5190.29%0.67%-0.38%
1960550,565(43.2%)(Δ 48,707)722,381(56.7%)(Δ -6,806)(43.2%, 56.7%, 0.0%)230(0.0%)Eric Hass0.02%8640.07%0.73%-0.66%
1964733,030(62.0%)(Δ 182,465)449,148(38.0%)(Δ -273,233)(61.9%, 37.9%, 0.0%)0(0.0%)None0.00%2,3610.20%0.48%-0.28%
1968476,699(41.0%)(Δ -256,331)619,106(53.3%)(Δ 169,958)(40.8%, 53.0%, 5.7%)66,422(5.7%)George Wallace5.69%72,1266.18%13.86%-7.68%
1972496,206(40.5%)(Δ 19,507)706,207(57.7%)(Δ 87,101)(40.5%, 57.6%, 1.8%)22,056(1.8%)John Schmitz1.80%23,5311.92%1.80%0.12%
1976619,931(48.7%)(Δ 123,725)632,863(49.7%)(Δ -73,344)(48.5%, 49.5%, 1.6%)20,051(1.6%)Eugene McCarthy1.57%26,5122.07%1.90%0.17%
1980508,672(39.1%)(Δ -111,259)676,026(52.0%)(Δ 43,163)(38.6%, 51.3%, 8.8%)115,633(8.9%)John Anderson8.78%132,96310.09%8.24%1.85%
1984605,620(46.2%)(Δ 96,948)703,088(53.6%)(Δ 27,062)(45.9%, 53.3%, 0.1%)1,844(0.1%)David Bergland0.14%11,0970.84%0.67%0.17%
1988670,557(55.0%)(Δ 64,937)545,355(44.8%)(Δ -157,733)(54.7%, 44.5%, 0.2%)2,494(0.2%)Ron Paul0.20%9,7020.79%0.98%-0.19%
1992586,353(43.6%)(Δ -84,204)504,891(37.5%)(Δ -40,464)(43.3%, 37.3%, 18.7%)253,468(18.8%)Ross Perot18.71%263,36319.44%19.55%-0.10%
1996620,258(50.9%)(Δ 33,905)492,644(40.4%)(Δ -12,247)(50.3%, 39.9%, 8.5%)105,159(8.6%)Ross Perot8.52%121,1739.82%10.05%-0.23%
2000638,517(49.0%)(Δ 18,259)634,373(48.7%)(Δ 141,729)(48.5%, 48.2%, 2.2%)29,374(2.3%)Ralph Nader2.23%42,6733.24%3.75%-0.50%
2004741,898(49.5%)(Δ 103,381)751,957(50.1%)(Δ 117,584)(49.2%, 49.9%, 0.4%)5,973(0.4%)Ralph Nader0.40%13,0530.87%1.00%-0.13%
2008828,940(54.6%)(Δ 87,042)682,379(44.9%)(Δ -69,578)(53.9%, 44.4%, 0.5%)8,014(0.5%)Ralph Nader0.52%25,8041.68%1.42%0.26%
2012822,544(52.5%)(Δ -6,396)730,617(46.7%)(Δ 48,238)(52.0%, 46.2%, 0.8%)12,926(0.8%)Johnson/Gray0.82%29,0191.83%1.73%0.10%
2016653,669(43.2%)(Δ -168,875)800,983(52.9%)(Δ 70,366)(41.7%, 51.1%, 3.8%)59,186(3.9%)Johnson/Weld3.78%111,3797.11%5.73%1.38%
2020759,061(45.3%)(Δ 105,392)897,672(53.5%)(Δ 96,689)(44.9%, 53.1%, 1.2%)19,637(1.2%)Jorgensen/Cohen1.16%34,1382.02%1.84%0.17%
2024707,278(42.9%)(Δ -51,783)927,019(56.3%)(Δ 29,347)(42.5%, 55.7%, 0.8%)13,122(0.8%)Kennedy/Shanahan0.79%29,2091.76%1.88%-0.12%

Column explanations

Δ
Change (delta) in the value from the previous election year.
Year
Election year.
D
Number of votes for the Democratic candidate (raw count(pct%)).
R
Number of votes for the Republican candidate (raw count(pct%)).
Margin (D%, R%, 3rd%)
Vote share breakdown showing Democratic %, Republican %, and top third-party % in format (D%, R%, 3rd%).
Other votes
Number of votes for third-party (other) candidates (raw count(pct%)).
Top 3rd-Party Candidate
Name of the highest-vote third-party / other candidate in that state and year.
Top 3rd-Party Share
Share of the vote received by third-party (other) candidates.
Total 3rd-Party Votes
Total votes for all third-party / other candidates combined (may exceed top candidate).
State 3rd-Party Share
Share of the vote received by third-party (other) candidates.
3rd-Party Nat. Share
The national third-party share for that year (3rd-Party votes / total votes).
3rd-Party Rel. Share
Third-party share relative to the national third-party share (3rd-Party share - Nat. 3rd-Party share).

Iowa (IA) — Two-Party Data

YearDRMargin (D%, R%, 3rd%)2-Party Margin2-Party Nat. Margin2-Party Rel. MarginEVs
186449,525(35.9%)88,500(64.1%)(35.9%, 64.1%, 0.0%)R+28.2R+10.1R+18.28
186874,040(38.1%)(Δ 24,515)120,399(61.9%)(Δ 31,899)(38.1%, 61.9%, 0.0%)R+23.8(Δ D+4.4)R+5.3(Δ D+4.8)R+18.5(Δ R+0.4)8
187281,636(38.3%)(Δ 7,596)131,566(61.7%)(Δ 11,167)(37.7%, 60.8%, 1.0%)R+23.4(Δ D+0.4)R+11.9(Δ R+6.5)R+11.5(Δ D+7.0)11
1876112,121(39.6%)(Δ 30,485)171,326(60.4%)(Δ 39,760)(38.3%, 58.5%, 3.2%)R+20.9(Δ D+2.5)D+3.0(Δ D+14.9)R+23.9(Δ R+12.4)11
1880105,845(36.5%)(Δ -6,276)183,927(63.5%)(Δ 12,601)(32.7%, 56.9%, 10.1%)R+26.9(Δ R+6.1)R+0.1(Δ R+3.1)R+26.8(Δ R+2.9)11
1884177,316(47.4%)(Δ 71,471)197,089(52.6%)(Δ 13,162)(47.0%, 52.3%, 0.4%)R+5.3(Δ D+21.7)D+0.6(Δ D+0.7)R+5.9(Δ D+21.0)13
1888179,877(45.9%)(Δ 2,561)211,603(54.1%)(Δ 14,514)(44.5%, 52.4%, 2.3%)R+8.1(Δ R+2.8)D+0.9(Δ D+0.3)R+9.0(Δ R+3.1)13
1892196,367(47.2%)(Δ 16,490)219,795(52.8%)(Δ 8,192)(44.3%, 49.6%, 4.6%)R+5.6(Δ D+2.5)D+3.4(Δ D+2.5)R+9.0(Δ R+0.0)13
1896223,741(43.6%)(Δ 27,374)289,293(56.4%)(Δ 69,498)(42.9%, 55.5%, 0.9%)R+12.8(Δ R+7.1)R+4.4(Δ R+7.8)R+8.4(Δ D+0.6)13
1900209,265(40.5%)(Δ -14,476)307,808(59.5%)(Δ 18,515)(39.5%, 58.0%, 1.8%)R+19.1(Δ R+6.3)R+6.3(Δ R+1.9)R+12.7(Δ R+4.4)13
1904149,276(32.6%)(Δ -59,989)308,158(67.4%)(Δ 350)(30.7%, 63.4%, 3.1%)R+34.7(Δ R+15.7)R+20.0(Δ R+13.7)R+14.7(Δ R+2.0)13
1908200,771(42.2%)(Δ 51,495)275,209(57.8%)(Δ -32,949)(40.6%, 55.6%, 2.0%)R+15.6(Δ D+19.1)R+9.0(Δ D+11.0)R+6.6(Δ D+8.1)13
1912185,325(53.4%)(Δ -15,446)161,819(46.6%)(Δ -113,390)(37.6%, 32.9%, 24.3%)D+6.8(Δ D+22.4)D+20.9(Δ D+29.9)R+14.1(Δ R+7.5)13
1916218,699(43.8%)(Δ 33,374)280,439(56.2%)(Δ 118,620)(42.6%, 54.6%, 2.1%)R+12.4(Δ R+19.1)D+3.3(Δ R+17.6)R+15.6(Δ R+1.5)13
1920227,921(26.4%)(Δ 9,222)634,674(73.6%)(Δ 354,235)(25.5%, 70.9%, 1.9%)R+47.2(Δ R+34.8)R+27.7(Δ R+31.0)R+19.5(Δ R+3.8)13
1924162,600(23.2%)(Δ -65,321)537,635(76.8%)(Δ -97,039)(16.6%, 55.0%, 27.9%)R+53.6(Δ R+6.4)R+30.4(Δ R+2.7)R+23.1(Δ R+3.7)13
1928379,311(37.8%)(Δ 216,711)623,570(62.2%)(Δ 85,935)(37.6%, 61.8%, 0.3%)R+24.4(Δ D+29.2)R+17.6(Δ D+12.8)R+6.8(Δ D+16.4)13
1932598,019(59.1%)(Δ 218,708)414,433(40.9%)(Δ -209,137)(57.7%, 40.0%, 2.0%)D+18.1(Δ D+42.5)D+18.3(Δ D+35.9)R+0.2(Δ D+6.6)11
1936621,756(56.0%)(Δ 23,737)487,977(44.0%)(Δ 73,544)(54.4%, 42.7%, 2.6%)D+12.1(Δ R+6.1)D+24.9(Δ D+6.6)R+12.9(Δ R+12.7)11
1940578,800(47.8%)(Δ -42,956)632,370(52.2%)(Δ 144,393)(47.6%, 52.0%, 0.0%)R+4.4(Δ R+16.5)D+10.0(Δ R+14.9)R+14.4(Δ R+1.6)11
1944499,876(47.7%)(Δ -78,924)547,267(52.3%)(Δ -85,103)(47.5%, 52.0%, 0.1%)R+4.5(Δ R+0.1)D+7.5(Δ R+2.5)R+12.1(Δ D+2.3)10
1948522,380(51.4%)(Δ 22,504)494,018(48.6%)(Δ -53,249)(50.3%, 47.6%, 1.2%)D+2.8(Δ D+7.3)D+4.7(Δ R+2.8)R+1.9(Δ D+10.1)10
1952451,513(35.8%)(Δ -70,867)808,906(64.2%)(Δ 314,888)(35.6%, 63.8%, 0.4%)R+28.4(Δ R+31.1)R+10.9(Δ R+15.6)R+17.5(Δ R+15.5)10
1956501,858(40.8%)(Δ 50,345)729,187(59.2%)(Δ -79,719)(40.7%, 59.1%, 0.3%)R+18.5(Δ D+9.9)R+15.5(Δ R+4.6)R+3.0(Δ D+14.5)10
1960550,565(43.3%)(Δ 48,707)722,381(56.7%)(Δ -6,806)(43.2%, 56.7%, 0.0%)R+13.5(Δ D+5.0)D+0.2(Δ D+15.7)R+13.7(Δ R+10.7)10
1964733,030(62.0%)(Δ 182,465)449,148(38.0%)(Δ -273,233)(61.9%, 37.9%, 0.0%)D+24.0(Δ D+37.5)D+22.7(Δ D+22.5)D+1.3(Δ D+15.0)9
1968476,699(43.5%)(Δ -256,331)619,106(56.5%)(Δ 169,958)(40.8%, 53.0%, 5.7%)R+13.0(Δ R+37.0)R+0.8(Δ R+23.5)R+12.2(Δ R+13.5)9
1972496,206(41.3%)(Δ 19,507)706,207(58.7%)(Δ 87,101)(40.5%, 57.6%, 1.8%)R+17.5(Δ R+4.5)R+23.6(Δ R+22.8)D+6.1(Δ D+18.3)8
1976619,931(49.5%)(Δ 123,725)632,863(50.5%)(Δ -73,344)(48.5%, 49.5%, 1.6%)R+1.0(Δ D+16.4)D+2.1(Δ D+25.7)R+3.1(Δ R+9.2)8
1980508,672(42.9%)(Δ -111,259)676,026(57.1%)(Δ 43,163)(38.6%, 51.3%, 8.8%)R+14.1(Δ R+13.1)R+10.6(Δ R+12.7)R+3.5(Δ R+0.4)8
1984605,620(46.3%)(Δ 96,948)703,088(53.7%)(Δ 27,062)(45.9%, 53.3%, 0.1%)R+7.4(Δ D+6.7)R+18.3(Δ R+7.7)D+10.9(Δ D+14.4)8
1988670,557(55.1%)(Δ 64,937)545,355(44.9%)(Δ -157,733)(54.7%, 44.5%, 0.2%)D+10.3(Δ D+17.7)R+7.8(Δ D+10.5)D+18.1(Δ D+7.2)8
1992586,353(53.7%)(Δ -84,204)504,891(46.3%)(Δ -40,464)(43.3%, 37.3%, 18.7%)D+7.5(Δ R+2.8)D+6.9(Δ D+14.7)D+0.6(Δ R+17.5)7
1996620,258(55.7%)(Δ 33,905)492,644(44.3%)(Δ -12,247)(50.3%, 39.9%, 8.5%)D+11.5(Δ D+4.0)D+9.5(Δ D+2.6)D+2.0(Δ D+1.4)7
2000638,517(50.2%)(Δ 18,259)634,373(49.8%)(Δ 141,729)(48.5%, 48.2%, 2.2%)D+0.3(Δ R+11.1)D+0.5(Δ R+8.9)R+0.2(Δ R+2.2)7
2004741,898(49.7%)(Δ 103,381)751,957(50.3%)(Δ 117,584)(49.2%, 49.9%, 0.4%)R+0.7(Δ R+1.0)R+2.5(Δ R+3.0)D+1.8(Δ D+2.0)7
2008828,940(54.8%)(Δ 87,042)682,379(45.2%)(Δ -69,578)(53.9%, 44.4%, 0.5%)D+9.7(Δ D+10.4)D+7.4(Δ D+9.9)D+2.3(Δ D+0.5)7
2012822,544(53.0%)(Δ -6,396)730,617(47.0%)(Δ 48,238)(52.0%, 46.2%, 0.8%)D+5.9(Δ R+3.8)D+3.9(Δ R+3.4)D+2.0(Δ R+0.3)6
2016653,669(44.9%)(Δ -168,875)800,983(55.1%)(Δ 70,366)(41.7%, 51.1%, 3.8%)R+10.1(Δ R+16.0)D+2.2(Δ R+1.7)R+12.4(Δ R+14.3)6
2020759,061(45.8%)(Δ 105,392)897,672(54.2%)(Δ 96,689)(44.9%, 53.1%, 1.2%)R+8.4(Δ D+1.8)D+4.5(Δ D+2.3)R+12.9(Δ R+0.6)6
2024707,278(43.3%)(Δ -51,783)927,019(56.7%)(Δ 29,347)(42.5%, 55.7%, 0.8%)R+13.4(Δ R+5.1)R+1.5(Δ R+6.0)R+11.9(Δ D+1.0)6

Column explanations

Δ
Change (delta) in the value from the previous election year.
Year
Election year.
D
Number of votes for the Democratic candidate (raw count(pct%)).
R
Number of votes for the Republican candidate (raw count(pct%)).
Margin (D%, R%, 3rd%)
Vote share breakdown showing Democratic %, Republican %, and top third-party % in format (D%, R%, 3rd%).
2-Party Margin
Margin between the two major-party candidates, ignoring third-party votes ((D - R)/(D + R)).
2-Party Nat. Margin
The national presidential margin for that year, including third-party votes ((D_total - R_total)/total_votes).
2-Party Rel. Margin
The presidential margin relative to the national presidential margin (Margin - Nat. Margin).
EVs
Number of electoral votes allocated to this state or unit.

Iowa (IA) — Senate Total Data

YearDRMargin (D%, R%, 3rd%)ClassD Cand.R Cand.Senate MarginNat. MarginRel. MarginTotal votesSource
1978395,066(47.9%)421,598(51.1%)(47.9%, 51.1%, 0.5%)IIDICK CLARKROGER W. JEPSENR+3.2D+3.0(Δ R+9.3)R+6.2824,576
1980581,545(45.5%)683,014(53.5%)(45.5%, 53.5%, 0.5%)IIIJOHN CULVERCHARLES E. GRASSLEYR+7.9D+11.0(Δ D+8.0)R+18.91,276,986
1984716,883(55.5%)(Δ 321,817)564,381(43.7%)(Δ 142,783)(55.5%, 43.7%, 0.9%)IITOM HARKINROGER W. JEPSEND+11.8(Δ D+15.0)R+1.4(Δ R+14.8)D+13.2(Δ D+19.4)1,292,700(Δ 468,124)
1986299,406(33.6%)(Δ -282,139)588,880(66.0%)(Δ -94,134)(33.6%, 66.0%, 0.4%)IIIJOHN O. ROEHRICKCHARLES E. GRASSLEYR+32.5(Δ R+24.5)D+2.3(Δ D+3.7)R+34.8(Δ R+15.9)891,762(Δ -385,224)
1990535,975(54.5%)(Δ -180,908)446,869(45.4%)(Δ -117,512)(54.5%, 45.4%, 0.1%)IITOM HARKINTHOMAS J. TAUKED+9.1(Δ R+2.7)D+4.5(Δ R+1.4)D+4.6(Δ R+8.6)983,933(Δ -308,767)
1992351,561(27.2%)(Δ 52,155)899,761(69.6%)(Δ 310,881)(27.2%, 69.6%, 1.3%)IIIJEAN LLOYD-JONESCHUCK GRASSLEYR+42.4(Δ R+10.0)D+5.4(Δ D+0.9)R+47.8(Δ R+13.0)1,292,494(Δ 400,732)
1996634,166(51.8%)(Δ 98,191)571,807(46.7%)(Δ 124,938)(51.8%, 46.7%, 0.8%)IITOM HARKINJIM LIGHTFOOTD+5.1(Δ R+4.0)R+1.5(Δ D+4.4)D+6.6(Δ D+2.0)1,224,054(Δ 240,121)
1998289,049(30.5%)(Δ -62,512)648,480(68.4%)(Δ -251,281)(30.5%, 68.4%, 0.8%)IIIDAVID OSTERBERGCHARLES E. GRASSLEYR+37.9(Δ D+4.5)D+1.3(Δ D+2.8)R+39.2(Δ D+8.6)947,907(Δ -344,587)
2002554,278(54.2%)(Δ -79,888)447,892(43.8%)(Δ -123,915)(54.2%, 43.8%, 1.1%)IITOM HARKINGREG GANSKED+10.4(Δ D+5.3)R+4.1(Δ R+4.2)D+14.5(Δ D+7.9)1,023,075(Δ -200,979)
2004412,365(27.9%)(Δ 123,316)1,038,175(70.2%)(Δ 389,695)(27.9%, 70.2%, 1.0%)IIIARTHUR SMALLCHARLES E. GRASSLEYR+42.3(Δ R+4.4)D+4.3(Δ D+8.4)R+46.6(Δ R+7.3)1,479,228(Δ 531,321)
2008941,665(62.7%)(Δ 387,387)560,006(37.3%)(Δ 112,114)(62.7%, 37.3%, 0.0%)IITOM HARKINCHRISTOPHER REEDD+25.4(Δ D+15.0)D+7.5(Δ R+5.7)D+17.9(Δ D+3.4)1,502,918(Δ 479,843)
2010371,686(33.3%)(Δ -40,679)718,215(64.4%)(Δ -319,960)(33.3%, 64.4%, 2.3%)IIIROXANNE CONLINCHUCK GRASSLEYR+31.0(Δ D+11.3)R+4.6(Δ R+12.2)R+26.4(Δ D+20.1)1,116,063(Δ -363,165)
2014494,370(43.8%)(Δ -447,295)588,575(52.2%)(Δ 28,569)(43.8%, 52.1%, 2.4%)IIBRUCE BRALEYJONI ERNSTR+8.3(Δ R+33.7)R+7.2(Δ R+19.5)R+1.2(Δ R+19.0)1,129,700(Δ -373,218)
2016549,460(35.7%)(Δ 177,774)926,007(60.2%)(Δ 207,792)(35.7%, 60.1%, 2.7%)IIIPATTY JUDGECHUCK GRASSLEYR+24.4(Δ D+6.6)D+6.0(Δ D+13.1)R+30.4(Δ R+4.0)1,541,036(Δ 424,973)
2020754,859(44.4%)(Δ 260,489)864,997(50.9%)(Δ 276,422)(44.4%, 50.9%, 2.2%)IITHERESA GREENFIELDJONI ERNSTR+6.5(Δ D+1.9)R+2.3(Δ R+19.1)R+4.2(Δ R+3.0)1,700,130(Δ 570,430)
2022533,330(43.8%)(Δ -16,130)681,501(56.0%)(Δ -244,506)(43.8%, 56.0%, 0.1%)IIIMichael FrankenChuck GrassleyR+12.2(Δ D+12.3)R+2.4(Δ R+0.1)R+9.8(Δ D+20.6)1,216,646(Δ -324,390)Wikipedia

Column explanations

Δ
Change (delta) in the value from the previous election year.
Year
Election year.
D
Number of votes for the Democratic candidate (raw count(pct%)).
R
Number of votes for the Republican candidate (raw count(pct%)).
Margin (D%, R%, 3rd%)
Vote share breakdown showing Democratic %, Republican %, and top third-party % in format (D%, R%, 3rd%).
Class
Senate class (I, II, or III) for this race.
D Cand.
Name of the Democratic candidate.
R Cand.
Name of the Republican candidate.
Senate Margin
Senate margin between the two major-party candidates, including third-party votes ((D - R)/total).
Nat. Margin
The national presidential margin for that year, including third-party votes ((D_total - R_total)/total_votes).
Rel. Margin
The presidential margin relative to the national presidential margin (Margin - Nat. Margin).
Total votes
Total voter turnout or ballots cast (when provided).
Source
URL of the source for this data (usually Wikipedia).

Iowa (IA) — Senate Third-Party Data

YearDRMargin (D%, R%, 3rd%)Other votesTop 3rd-Party CandidateTop 3rd-Party ShareTotal 3rd-Party VotesState 3rd-Party Share3rd-Party Nat. Share3rd-Party Rel. Share
1978395,066(47.9%)421,598(51.1%)(47.9%, 51.1%, 0.5%)7,912(1.0%)GERALD LEO BAKER0.51%7,9120.96%1.77%-0.81%
1980581,545(45.5%)683,014(53.5%)(45.5%, 53.5%, 0.5%)12,427(1.0%)GARRY DE YOUNG0.46%12,4270.97%3.33%-2.36%
1984716,883(55.5%)(Δ 321,817)564,381(43.7%)(Δ 142,783)(55.5%, 43.7%, 0.9%)11,436(0.9%)GARRY DE YOUNG0.85%11,4360.88%0.86%0.02%
1986299,406(33.6%)(Δ -282,139)588,880(66.0%)(Δ -94,134)(33.6%, 66.0%, 0.4%)3,476(0.4%)JOHN MASTERS0.38%3,4760.39%1.68%-1.29%
1990535,975(54.5%)(Δ -180,908)446,869(45.4%)(Δ -117,512)(54.5%, 45.4%, 0.1%)1,089(0.1%)SCATTER0.11%1,0890.11%1.81%-1.70%
1992351,561(27.2%)(Δ 52,155)899,761(69.6%)(Δ 310,881)(27.2%, 69.6%, 1.3%)41,172(3.2%)STUART ZIMMERMAN1.27%41,1723.19%5.04%-1.85%
1996634,166(51.8%)(Δ 98,191)571,807(46.7%)(Δ 124,938)(51.8%, 46.7%, 0.8%)18,081(1.5%)SUE ATKINSON0.80%18,0811.48%2.64%-1.16%
1998289,049(30.5%)(Δ -62,512)648,480(68.4%)(Δ -251,281)(30.5%, 68.4%, 0.8%)10,378(1.1%)SUSAN MARCUS0.80%10,3781.09%3.30%-2.20%
2002554,278(54.2%)(Δ -79,888)447,892(43.8%)(Δ -123,915)(54.2%, 43.8%, 1.1%)20,204(2.0%)TIMOTHY A. HARTHAN1.11%20,2041.97%4.10%-2.12%
2004412,365(27.9%)(Δ 123,316)1,038,175(70.2%)(Δ 389,695)(27.9%, 70.2%, 1.0%)28,213(1.9%)CHRISTY ANN WELTY1.03%28,2131.91%3.46%-1.56%
2008941,665(62.7%)(Δ 387,387)560,006(37.3%)(Δ 112,114)(62.7%, 37.3%, 0.0%)0(0.0%)None0.00%00.00%3.51%-3.51%
2010371,686(33.3%)(Δ -40,679)718,215(64.4%)(Δ -319,960)(33.3%, 64.4%, 2.3%)25,290(2.3%)JOHN HEIDERSCHEIT2.27%25,2902.27%6.58%-4.32%
2014494,370(43.8%)(Δ -447,295)588,575(52.2%)(Δ 28,569)(43.8%, 52.1%, 2.4%)45,644(4.0%)RICK STEWART2.37%45,6444.04%4.37%-0.33%
2016549,460(35.7%)(Δ 177,774)926,007(60.2%)(Δ 207,792)(35.7%, 60.1%, 2.7%)63,884(4.2%)CHARLES ALDRICH2.71%63,8844.15%4.46%-0.32%
2020754,859(44.4%)(Δ 260,489)864,997(50.9%)(Δ 276,422)(44.4%, 50.9%, 2.2%)79,063(4.7%)RICK STEWART2.17%79,0634.65%3.96%0.69%
2022533,330(43.8%)(Δ -16,130)681,501(56.0%)(Δ -244,506)(43.8%, 56.0%, 0.1%)1,815(0.1%)Write-in0.15%1,8150.15%15.16%-15.01%

Column explanations

Δ
Change (delta) in the value from the previous election year.
Year
Election year.
D
Number of votes for the Democratic candidate (raw count(pct%)).
R
Number of votes for the Republican candidate (raw count(pct%)).
Margin (D%, R%, 3rd%)
Vote share breakdown showing Democratic %, Republican %, and top third-party % in format (D%, R%, 3rd%).
Other votes
Number of votes for third-party (other) candidates (raw count(pct%)).
Top 3rd-Party Candidate
Name of the highest-vote third-party / other candidate in that state and year.
Top 3rd-Party Share
Share of the vote received by third-party (other) candidates.
Total 3rd-Party Votes
Total votes for all third-party / other candidates combined (may exceed top candidate).
State 3rd-Party Share
Share of the vote received by third-party (other) candidates.
3rd-Party Nat. Share
The national third-party share for that year (3rd-Party votes / total votes).
3rd-Party Rel. Share
Third-party share relative to the national third-party share (3rd-Party share - Nat. 3rd-Party share).

Iowa (IA) — Senate Two-Party Data

YearDRMargin (D%, R%, 3rd%)2-Party Margin2-Party Nat. Margin2-Party Rel. Margin
1978395,066(48.4%)421,598(51.6%)(47.9%, 51.1%, 0.5%)R+3.2D+3.0(Δ R+9.8)R+6.3
1980581,545(46.0%)683,014(54.0%)(45.5%, 53.5%, 0.5%)R+8.0D+11.9(Δ D+8.9)R+19.9
1984716,883(56.0%)(Δ 321,817)564,381(44.0%)(Δ 142,783)(55.5%, 43.7%, 0.9%)D+11.9(Δ D+15.2)R+1.4(Δ R+15.5)D+13.3(Δ D+19.6)
1986299,406(33.7%)(Δ -282,139)588,880(66.3%)(Δ -94,134)(33.6%, 66.0%, 0.4%)R+32.6(Δ R+24.6)D+2.4(Δ D+3.8)R+35.0(Δ R+15.1)
1990535,975(54.5%)(Δ -180,908)446,869(45.5%)(Δ -117,512)(54.5%, 45.4%, 0.1%)D+9.1(Δ R+2.8)D+4.6(Δ R+1.4)D+4.5(Δ R+8.8)
1992351,561(28.1%)(Δ 52,155)899,761(71.9%)(Δ 310,881)(27.2%, 69.6%, 1.3%)R+43.8(Δ R+11.2)D+5.8(Δ D+1.2)R+49.6(Δ R+14.6)
1996634,166(52.6%)(Δ 98,191)571,807(47.4%)(Δ 124,938)(51.8%, 46.7%, 0.8%)D+5.2(Δ R+3.9)R+1.5(Δ D+4.8)D+6.7(Δ D+2.2)
1998289,049(30.8%)(Δ -62,512)648,480(69.2%)(Δ -251,281)(30.5%, 68.4%, 0.8%)R+38.3(Δ D+5.5)D+1.5(Δ D+3.0)R+39.8(Δ D+9.8)
2002554,278(55.3%)(Δ -79,888)447,892(44.7%)(Δ -123,915)(54.2%, 43.8%, 1.1%)D+10.6(Δ D+5.4)R+4.4(Δ R+4.5)D+15.0(Δ D+8.4)
2004412,365(28.4%)(Δ 123,316)1,038,175(71.6%)(Δ 389,695)(27.9%, 70.2%, 1.0%)R+43.1(Δ R+4.8)D+4.4(Δ D+8.9)R+47.6(Δ R+7.8)
2008941,665(62.7%)(Δ 387,387)560,006(37.3%)(Δ 112,114)(62.7%, 37.3%, 0.0%)D+25.4(Δ D+14.8)D+7.8(Δ R+6.4)D+17.6(Δ D+2.6)
2010371,686(34.1%)(Δ -40,679)718,215(65.9%)(Δ -319,960)(33.3%, 64.4%, 2.3%)R+31.8(Δ D+11.3)R+5.1(Δ R+12.9)R+26.7(Δ D+20.9)
2014494,370(45.7%)(Δ -447,295)588,575(54.3%)(Δ 28,569)(43.8%, 52.1%, 2.4%)R+8.7(Δ R+34.1)R+7.5(Δ R+20.9)R+1.2(Δ R+18.8)
2016549,460(37.2%)(Δ 177,774)926,007(62.8%)(Δ 207,792)(35.7%, 60.1%, 2.7%)R+25.5(Δ D+6.3)D+6.9(Δ D+14.4)R+32.4(Δ R+5.7)
2020754,859(46.6%)(Δ 260,489)864,997(53.4%)(Δ 276,422)(44.4%, 50.9%, 2.2%)R+6.8(Δ D+1.9)R+2.4(Δ R+21.1)R+4.4(Δ R+3.2)
2022533,330(43.9%)(Δ -16,130)681,501(56.1%)(Δ -244,506)(43.8%, 56.0%, 0.1%)R+12.2(Δ D+13.3)R+2.8(Δ R+0.5)R+9.4(Δ D+23.0)

Column explanations

Δ
Change (delta) in the value from the previous election year.
Year
Election year.
D
Number of votes for the Democratic candidate (raw count(pct%)).
R
Number of votes for the Republican candidate (raw count(pct%)).
Margin (D%, R%, 3rd%)
Vote share breakdown showing Democratic %, Republican %, and top third-party % in format (D%, R%, 3rd%).
2-Party Margin
Margin between the two major-party candidates, ignoring third-party votes ((D - R)/(D + R)).
2-Party Nat. Margin
The national presidential margin for that year, including third-party votes ((D_total - R_total)/total_votes).
2-Party Rel. Margin
The presidential margin relative to the national presidential margin (Margin - Nat. Margin).