# 1950 United States Senate election in Missouri

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The 1950 United States Senate election in Missouri took place on November 7, 1950 in Missouri. Incumbent Republican Senator Forrest C. Donnell ran for a second term in office but was defeated by Democratic nominee Thomas C. Hennings Jr.

## Democratic primary
### Candidates

* Emery Allison, former State Senator from Maries County
* Thomas C. Hennings Jr., lawyer and former U.S. Representative from St. Louis
* Marjorie Bell Hinrichs, cosmetics manufacturer
* James W. Hopkins, accountant
* Ben M. Johnson, contractor

### Results

Democratic primary August 1, 1950 :
| Party | Party | Candidate | Votes | % |
| | Democratic | Thomas C. Hennings Jr. | 182,333 | 45.03 |
| | Democratic | Emery Allison | 178,201 | 44.01 |
| | Democratic | James W. Hopkins | 15,859 | 3.92 |
| | Democratic | Ben M. Johnson | 15,559 | 3.84 |
| | Democratic | Marjorie Bell Hinrichs | 12,986 | 3.21 |
| Total votes | Total votes | Total votes | 404,938 | 100 |

## Republican primary
### Candidates

* Gordon R. Coates, building materials dealer
* Forrest C. Donnell, incumbent Senator since 1945
* William McKinley Thomas, furniture warehouse employee

### Results

Republican primary August 1, 1950 :
| Party | Party | Candidate | Votes | % |
| | Republican | Forrest C. Donnell (incumbent) | 200,792 | 84.85 |
| | Republican | William McKinley Thomas | 17,407 | 7.36 |
| | Republican | Gordon R. Coates | 10,919 | 4.61 |
| | Republican | Hiram Grosby | 7,527 | 3.18 |
| Total votes | Total votes | Total votes | 236,645 | 100 |

## General election
### Candidates

* Forrest C. Donnell, incumbent Senator since 1945 (Republican)
* Henry W. Genck (Socialist Labor)
* John W. Hamilton (Christian Nationalist)
* Thomas C. Hennings Jr., lawyer and former U.S. Representative from St. Louis (Democratic)

### Results

1950 United States Senate election in Missouri :
| Party | Party | Candidate | Votes | % | ±% |
| | Democratic | Thomas C. Hennings Jr. | 685,732 | 53.60 | +3.78 |
| | Republican | Forrest C. Donnell (incumbent) | 592,922 | 46.34 | −3.61 |
| | Christian Nationalist | John W. Hamilton | 610 | 0.05 | +0.05 |
| | Socialist Labor | Henry W. Genck | 150 | 0.01 | +0.00 |
| Majority | Majority | Majority | 92,810 | 7.26 | |
| Turnout | Turnout | Turnout | 1,279,414 | | |
| | Democratic gain from Republican | Democratic gain from Republican | Swing | | |