# 1920 United States Senate election in South Dakota

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The 1920 United States Senate election in South Dakota took place on November 2, 1920. Incumbent Democratic Senator Edwin S. Johnson declined to seek re-election to a second term. In the Democratic primary, attorney Ulysses Simpson Grant Cherry defeated former State Senator Louis Napoleon Crill and former U.S. Marshal Tom Taubman, while in the Republican primary, Governor Peter Norbeck defeated former State Supreme Court Justice Dick Haney. In the general election, Cherry and Norbeck faced a litany of independent candidates, including Nonpartisan League candidate Tom Ayres. Benefiting from the split in left-wing candidates, Norbeck won by a wide margin, with Ayres narrowly beating out Cherry for second place.

## Democratic primary
### Candidates

* Ulysses Simpson Grant Cherry, Sioux Falls attorney
* Louis Napoleon Crill, former President Pro Tempore of the State Senate
* Tom Taubman, former U.S. Marshal for the District of South Dakota

### Results

Democratic primary :
| Party | Party | Candidate | Votes | % |
| | Democratic | Ulysses Simpson Grant Cherry | 2,821 | 38.64% |
| | Democratic | Louis Napoleon Crill | 2,675 | 36.64% |
| | Democratic | Tom Taubman | 1,805 | 24.72% |
| Total votes | Total votes | Total votes | 7,301 | 100.00% |

## Republican primary
### Candidates

* Peter Norbeck, Governor of South Dakota
* Dick Haney, former South Dakota Supreme Court Justice

### Results

Republican primary :
| Party | Party | Candidate | Votes | % |
| | Republican | Peter Norbeck | 43,893 | 58.71% |
| | Republican | Dick Haney | 30,870 | 41.29% |
| Total votes | Total votes | Total votes | 74,763 | 100.00% |

## General election
### Results

1920 United States Senate election in South Dakota :
| Party | Party | Candidate | Votes | % | ±% |
| | Republican | Peter Norbeck | 92,267 | 50.10% | +5.63% |
| | Nonpartisan League | Tom Ayres | 44,309 | 24.06% | — |
| | Democratic | U. S. G. Cherry | 36,833 | 20.00% | −28.32% |
| | Independent | R. O. Richards | 10,032 | 5.45% | — |
| | Independent | L. J. Manbeck | 738 | 0.40% | — |
| Majority | Majority | Majority | 47,958 | 26.04% | +22.19% |
| Turnout | Turnout | Turnout | 184,179 | | |
| | Republican gain from Democratic | Republican gain from Democratic | Republican gain from Democratic | Republican gain from Democratic | Republican gain from Democratic |