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County results La Follete Jr.: 30–40% 40–50% 50–60% 60–70% Callahan: 30–40% 40–50% Chapple: 30–40% 40–50% | |||||||||||||||||||||
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The1934 United States Senate election in Wisconsin was held on November 6, 1934.
IncumbentRepublican U.S. SenatorRobert La Follette Jr. left his party and, with his brotherPhilip, formed the newWisconsin Progressive Party. La Follette was re-elected on the Progressive ticket over Democrat John M. Callahan and RepublicanJohn B. Chapple.Robert La Follette Jr. was the first non-Republican to have won an election for this seat to the United States Senate from Wisconsin sinceJohn Lendrum Mitchell in1893.
| Party | Candidate | Votes | % | |
|---|---|---|---|---|
| Progressive | Robert M. La Follette Jr. (incumbent) | 154,373 | 100.00% | |
| Total votes | 154,373 | 100.00% | ||
| Party | Candidate | Votes | % | |
|---|---|---|---|---|
| Republican | John B. Chapple | 126,034 | 100.00% | |
| Total votes | 126,034 | 100.00% | ||

| Party | Candidate | Votes | % | |
|---|---|---|---|---|
| Democratic | John M. Callahan | 58,270 | 29.06% | |
| Democratic | Francis E. McGovern | 48,931 | 24.41% | |
| Democratic | Charles E. Hammersley | 38,369 | 19.14% | |
| Democratic | William D. Carroll | 29,137 | 14.53% | |
| Democratic | Gertrude Bowler | 25,785 | 12.86% | |
| Total votes | 200,492 | 100.00% | ||
| Party | Candidate | Votes | % | ±% | |
|---|---|---|---|---|---|
| Progressive | Robert La Follette Jr. (incumbent) | 440,513 | 47.78% | N/A | |
| Democratic | John M. Callahan | 223,438 | 24.24% | N/A | |
| Republican | John B. Chapple | 210,569 | 22.84% | ||
| Socialist | James P. Sheehan | 44,453 | 4.82% | N/A | |
| Communist | Fern Dobbins | 2,127 | 0.23% | ||
| Prohibition | Theodore Lee | 826 | 0.09% | ||
| Write-in | 23 | 0.00% | N/A | ||
| Total votes | 921,949 | 100.00% | |||
| Progressivegain fromRepublican | |||||