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United States · Election results history · 1940 Senate · Wisconsin
Election 1940 Results

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1940 US Senate election in Wisconsin

Robert M. La Follette Jr. (Progressive) beat Fred H. Clausen (Republican) in Wisconsin in 1940, 45.3% to 41.4%, a margin of 3.9 points and 51,917 votes.

The third-party hold continued from 1934, when Robert M. La Follette Jr. also won.

other candidates led in 37 of the 71 counties as they stood then and Republicans in 34. The largest, Milwaukee, cast 339,732 votes and went to the other candidates by 16.4 points. The closest was Ozaukee, where 35 votes separated the top two.

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Early projection, based on early and incomplete polling: the likely matchups, each weighted by the betting markets' odds of both nominations, not a result. Each county is its 2024 presidential margin moved by its state's projected swing; set a national vote and every state, district and county moves by the same amount from our projection. Colours run in 100 steps from a safe Republican to a safe Democratic margin. Boundaries: US Census Bureau.

Senate

CandidatePartyVotesShare
Robert M. La Follette Jr. won Progressive 605,609 45.3%
Fred H. Clausen Republican 553,692 41.4%
James E. Finnegan Democratic 176,688 13.2%
All other candidates 2,146 0.2%
Total1,338,135

Every county

CountyDemocratRepublicanOthersTotalMargin
Milwaukee 58,609 17.3% 112,685 33.2% 168,438 339,732 Others
Dane 3,171 5.1% 18,734 30.4% 39,757 61,662 Others
Racine 5,831 14.2% 16,088 39.1% 19,225 41,144 Others
Rock 4,028 11.3% 18,075 50.7% 13,581 35,684 R+39.4
Winnebago 5,049 15.0% 17,375 51.7% 11,194 33,618 R+36.7
Brown 6,752 20.4% 13,860 41.9% 12,446 33,058 R+21.5
Sheboygan 7,142 22.8% 13,375 42.7% 10,817 31,334 R+19.9
Outagamie 3,664 12.8% 14,946 52.0% 10,109 28,719 R+39.3
Waukesha 3,398 11.9% 15,573 54.3% 9,697 28,668 R+42.5
Kenosha 4,726 16.5% 9,973 34.8% 13,934 28,633 Others
Marathon 3,822 13.5% 11,979 42.4% 12,439 28,240 Others
Fond Du Lac 4,400 16.6% 13,577 51.1% 8,597 26,574 R+34.5
La Crosse 2,163 8.4% 11,553 44.8% 12,060 25,776 Others
Manitowoc 3,540 14.1% 8,742 34.8% 12,821 25,103 Others
Dodge 3,295 14.4% 11,486 50.1% 8,164 22,945 R+35.7
Douglas 2,406 11.4% 5,806 27.6% 12,857 21,069 Others
Eau Claire 1,165 6.2% 8,228 43.5% 9,530 18,923 Others
Wood 1,157 6.6% 7,439 42.2% 9,016 17,612 Others
Grant 1,468 8.4% 8,372 48.0% 7,585 17,425 R+39.6
Jefferson 2,955 17.3% 7,948 46.5% 6,186 17,089 R+29.2
Walworth 1,986 12.1% 10,981 66.7% 3,489 16,456 R+54.7
Waupaca 877 5.7% 8,705 56.5% 5,834 15,416 R+50.8
Chippewa 995 6.5% 7,003 46.0% 7,223 15,221 Others
Sauk 1,111 7.4% 6,912 45.7% 7,091 15,114 Others
Portage 3,900 26.1% 4,520 30.3% 6,496 14,916 Others
Columbia 1,144 7.8% 6,414 43.7% 7,112 14,670 Others
Marinette 2,565 17.8% 7,056 48.9% 4,801 14,422 R+31.1
Clark 822 6.2% 6,650 49.8% 5,893 13,365 R+43.6
Barron 757 5.7% 5,249 39.5% 7,284 13,290 Others
Shawano 1,319 9.9% 6,640 50.1% 5,303 13,262 R+40.1
Washington 1,706 13.4% 6,932 54.5% 4,076 12,714 R+41.1
Monroe 739 6.2% 5,151 43.0% 6,091 11,981 Others
Vernon 579 5.0% 5,281 45.2% 5,833 11,693 Others
Oconto 2,369 21.8% 5,053 46.5% 3,455 10,877 R+24.7
St. Croix 1,170 10.8% 4,404 40.7% 5,241 10,815 Others
Dunn 518 4.8% 5,278 49.1% 4,960 10,756 R+44.3
Polk 565 5.3% 3,766 35.6% 6,237 10,568 Others
Green 589 6.0% 4,459 45.2% 4,824 9,872 Others
Lincoln 606 6.3% 4,414 46.2% 4,543 9,563 Others
Trempealeau 757 8.1% 3,858 41.5% 4,682 9,297 Others
Langlade 1,986 22.1% 3,312 36.9% 3,669 8,967 Others
Ashland 896 10.0% 2,971 33.1% 5,098 8,965 Others
Pierce 405 4.6% 4,310 48.4% 4,186 8,901 R+43.9
Lafayette 1,366 15.4% 4,069 45.9% 3,425 8,860 R+30.5
Iowa 807 9.3% 4,176 47.9% 3,741 8,724 R+38.6
Oneida 1,107 13.2% 2,853 33.9% 4,446 8,406 Others
Richland 873 10.4% 5,038 60.0% 2,490 8,401 R+49.6
Ozaukee 1,201 14.9% 3,436 42.7% 3,401 8,038 R+27.8
Juneau 445 5.6% 3,356 41.9% 4,216 8,017 Others
Crawford 1,304 17.0% 3,543 46.2% 2,830 7,677 R+29.2
Door 452 6.1% 3,955 53.3% 3,011 7,418 R+47.2
Price 832 11.2% 3,381 45.7% 3,183 7,396 R+34.5
Calumet 1,065 14.6% 4,000 54.9% 2,222 7,287 R+40.3
Jackson 328 4.5% 2,850 39.4% 4,047 7,225 Others
Taylor 964 13.4% 2,902 40.2% 3,352 7,218 Others
Green Lake 1,023 14.8% 4,025 58.3% 1,852 6,900 R+43.5
Bayfield 566 8.3% 2,215 32.4% 4,065 6,846 Others
Rusk 849 12.8% 3,023 45.5% 2,765 6,637 R+32.8
Waushara 455 7.1% 4,295 67.0% 1,660 6,410 R+59.9
Kewaunee 1,096 17.1% 2,860 44.7% 2,442 6,398 R+27.6
Buffalo 263 4.3% 2,644 43.4% 3,185 6,092 Others
Washburn 302 5.7% 1,872 35.4% 3,108 5,282 Others
Iron 392 8.2% 1,363 28.5% 3,028 4,783 Others
Burnett 356 7.7% 1,544 33.2% 2,746 4,646 Others
Sawyer 686 14.8% 1,934 41.8% 2,010 4,630 Others
Vilas 787 17.9% 1,869 42.6% 1,736 4,392 R+24.6
Forest 1,081 26.7% 1,186 29.3% 1,783 4,050 Others
Marquette 365 9.2% 2,541 64.0% 1,064 3,970 R+54.8
Adams 172 4.9% 1,210 34.8% 2,097 3,479 Others
Pepin 238 7.7% 1,712 55.4% 1,139 3,089 R+47.7
Florence 211 12.0% 707 40.3% 837 1,755 Others

Counties as they stood in 1940; some have since been split, merged or renamed. Margin: the Democrat's share of all votes minus the Republican's. Sources and how the results were checked.

Wisconsin Senate elections we hold

YearWinnerMargin
2024 Tammy Baldwin (D) D+0.8
2022 Ron Johnson (R) R+1.0
2018 Tammy Baldwin (D) D+10.8
2016 Ron Johnson (R) R+3.4
2012 Tammy Baldwin (D) D+5.5
2010 Ron Johnson (R) R+4.8
2006 Herb Kohl (D) D+37.8
2004 Russel D. Feingold (D) D+11.2
2000 Herb Kohl (D) D+24.5
1998 Russell D. Feingold (D) D+2.1
1994 Herb Kohl (D) D+17.6
1992 Russell D. Feingold (D) D+6.6
1988 Herbert H. Kohl (D) D+4.5
1986 Robert W. Kasten Jr. (R) R+3.5
1982 William Proxmire (D) D+29.5
1980 Robert W. Kasten Jr. (R) R+1.9
1976 William Proxmire (D) D+45.6
1974 Gaylord Nelson (D) D+26.0
1970 William Proxmire (D) D+42.4
1968 Gaylord Nelson (D) D+23.4
1964 William Proxmire (D) D+6.7
1962 Gaylord Nelson (D) D+5.4
1958 William Proxmire (D) D+14.4
1956 Alexander Wiley (R) R+17.4
1952 Joseph McCarthy (R) R+8.7
1950 Alexander Wiley (R) R+7.1
1946 Joseph McCarthy (R) R+23.9
1944 Alexander Wiley (R) R+7.7
1940 Robert M. La Follette Jr. (other)
1938 Alexander Wiley (R) R+20.4
1934 Robert M. La Follette Jr. (other)
1932 F. Ryan Duffy (D) D+20.8
1928 Robert La Follette Jr. (R) R+85.6
1926 John J. Blaine (R) R+42.7
1922 Robert La Follette Sr. (R) R+64.1
1920 Irvine L. Lenroot (R) R+28.4
1916 Robert La Follette Sr. (R) R+27.3
1914 Paul O. Husting (D) D+0.3