# 1938 United States Senate election in Oklahoma

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The 1938 United States Senate election in Oklahoma took place on November 8, 1938. Incumbent Democratic Senator Elmer Thomas ran for re-election to a third term. He faced a spirited challenge in the Democratic primary from Congressman Gomer Smith and Governor E. W. Marland, but won the nomination with a slim plurality. In the general election, Thomas faced former State Senator Harry O. Glasser, the Republican nominee. Despite the nationwide trend favoring Republicans, Thomas overwhelmingly won re-election.

## Democratic primary
### Candidates

* Elmer Thomas, incumbent U.S. Senator
* Gomer Smith, U.S. Congressman from Oklahoma's 5th congressional district, 1932 Democratic candidate for the U.S. Senate
* E. W. Marland, Governor of Oklahoma
* Charles Francis Smith

### Results

Democratic primary :
| Party | Party | Candidate | Votes | % |
| | Democratic | Elmer Thomas (inc.) | 252,550 | 44.68% |
| | Democratic | Gomer Smith | 190,774 | 33.75% |
| | Democratic | E. W. Marland | 115,625 | 20.46% |
| | Democratic | Charles Francis Smith | 6,256 | 1.11% |
| Total votes | Total votes | Total votes | 565,205 | 100.00% |

## Republican primary
### Candidates

* Harry O. Glasser, former State Senator
* James D. Davidson, real estate salesman
* William Oliver Cromwell, former Oklahoma Attorney General, 1914 Progressive nominee for the U.S. Senate
* Wilfred Marion Leise

### Results

Republican primary :
| Party | Party | Candidate | Votes | % |
| | Republican | Harry O. Glasser | 17,668 | 36.04% |
| | Republican | James S. Davidson | 14,228 | 29.03% |
| | Republican | William Oliver Cromwell | 12,989 | 26.50% |
| | Republican | Wilfred Marion Leise | 4,133 | 8.43% |
| Total votes | Total votes | Total votes | 49,018 | 100.00% |

## Prohibition primary
### Candidates

* P. C. Nelson
* A. B. Lamb

### Results

Prohibition primary :
| Party | Party | Candidate | Votes | % |
| | Prohibition | P. C. Nelson | 91 | 54.49% |
| | Prohibition | A. B. Lamb | 76 | 45.51% |
| Total votes | Total votes | Total votes | 167 | 100.00% |

## General election
### Results

1938 United States Senate election in Oklahoma :
| Party | Party | Candidate | Votes | % | ±% |
| | Democratic | Elmer Thomas (inc.) | 307,936 | 65.37% | −0.24% |
| | Republican | Harry O. Glasser | 159,734 | 33.91% | +0.21% |
| | Prohibition | P.C. Nelson | 2,220 | 0.47% | — |
| | Independent | Raymond Burton Clark | 603 | 0.13% | — |
| | Independent | Herndon J. Thompson | 573 | 0.12% | — |
| Majority | Majority | Majority | 148,202 | 31.46% | −0.45% |
| Turnout | Turnout | Turnout | 471,066 | | |
| | Democratic hold | Democratic hold | Democratic hold | Democratic hold | Democratic hold |