# 1934 United States Senate election in Wisconsin

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vte :
The 1934 United States Senate election in Wisconsin was held on November 6, 1934.
Incumbent Republican U.S. Senator Robert La Follette Jr. left his party and, with his brother Philip, formed the new Wisconsin Progressive Party. La Follette was re-elected on the Progressive ticket over Democrat John M. Callahan and Republican John 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 since John Lendrum Mitchell in 1893.

## Progressive primary
### Candidates

* Robert M. La Follette Jr., incumbent senator since 1925

### Results

1934 Progressive U.S. Senate primary :
| Party | Party | Candidate | Votes | % |
| | Progressive | Robert M. La Follette Jr. (incumbent) | 154,373 | 100.00% |
| Total votes | Total votes | Total votes | 154,373 | 100.00% |

## Republican primary
### Candidates

* John B. Chapple, nominee for U.S. Senate in 1932

### Results

1934 Republican U.S. Senate primary :
| Party | Party | Candidate | Votes | % |
| | Republican | John B. Chapple | 126,034 | 100.00% |
| Total votes | Total votes | Total votes | 126,034 | 100.00% |

## Democratic primary
### Candidates

* Gertrude Bowler, Democratic Party activist and anti-Prohibitionist
* John M. Callahan, former Wisconsin Democratic Party chairman (1925–1927) and nominee for Wisconsin Secretary of State in 1910 and 1924
* William D. Carroll, state senator from Prairie du Chien
* Charles E. Hammersley, candidate for governor in 1930
* Francis E. McGovern, former governor of Wisconsin (1911–15)

### Results

1934 Democratic U.S. Senate primary :
| Party | 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 | Total votes | Total votes | 200,492 | 100.00% |

## General election
### Candidates

* John B. Chapple, candidate for U.S. Senate in 1932 (Republican)
* John M. Callahan, former Wisconsin Democratic Party chairman (Democratic)
* Fern Dobbins (Independent Communist)
* Robert M. La Follette Jr., incumbent senator since 1925 (Progressive)
* Theodore Lee (Independent Prohibition)
* James P. Sheehan (Socialist)

### Results

1934 U.S. Senate election in Wisconsin :
| Party | 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 | Fred H. Clausen | 210,569 | 22.84% | 62.73 |
| | Socialist | James P. Sheehan | 44,453 | 4.82% | N/A |
| | Communist | Fern Dobbins | 2,127 | 0.23% | 0.03 |
| | Prohibition | Theodore Lee | 826 | 0.09% | 2.79 |
| | Write-in | Write-in | 23 | 0.00% | N/A |
| Total votes | Total votes | Total votes | 921,949 | 100.00% |
| | Progressive gain from Republican | Progressive gain from Republican | Progressive gain from Republican | Progressive gain from Republican | Progressive gain from Republican |