# 1940 United States Senate election in Montana

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The 1940 United States Senate election in Montana took place on November 5, 1940. Incumbent United States Senator Burton K. Wheeler, who was first elected to the Senate in 1922, and was re-elected in 1928 and 1934, ran for re-election. Though he faced a serious challenger in the Democratic primary, he emerged victorious, and advanced to the general election, where he faced E. K. Cheadle, a state district judge and the Republican nominee. Just like in 1934, Wheeler won re-election in a landslide, winning his fourth term in the Senate.

## Democratic primary
### Candidates

* Burton K. Wheeler, incumbent United States Senator
* H. J. Freebourn, Attorney General of Montana

### Results

Democratic Party primary results :
| Party | Party | Candidate | Votes | % |
| | Democratic | Burton K. Wheeler (incumbent) | 75,498 | 72.86 |
| | Democratic | H. J. Freebourn | 28,128 | 27.14 |
| Total votes | Total votes | Total votes | 103,626 | 100.00 |

## Republican primary
### Candidates

* E. K. Cheadle, Tenth Judicial Circuit District Judge
* L. Ray Carroll, former State Senator
* Floyd C. Fluent

### Results

Republican Primary results :
| Party | Party | Candidate | Votes | % |
| | Republican | H. K. Cheadle | 22,273 | 52.13 |
| | Republican | L. Ray Carroll | 13,483 | 31.56 |
| | Republican | Floyd C. Fluent | 6,972 | 16.32 |
| Total votes | Total votes | Total votes | 42,728 | 100.00 |

## General election
### Results

United States Senate election in Montana, 1940 :
| Party | Party | Candidate | Votes | % | ±% |
| | Democratic | Burton K. Wheeler (incumbent) | 176,753 | 73.43% | +3.29% |
| | Republican | E. K. Cheadle | 63,941 | 26.57% | −2.17% |
| Majority | Majority | Majority | 112,812 | 46.87% | +5.47% |
| Turnout | Turnout | Turnout | 240,694 | | |
| | Democratic hold | Democratic hold | Swing | | |