# 1972 United States Senate election in Iowa

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The 1972 United States Senate election in Iowa took place on November 7, 1972. Incumbent Republican U.S. Senator Jack Miller ran for re-election to a third term but was defeated by Democrat Dick Clark. Iowa was one of fifteen states alongside Alabama, Arkansas, Colorado, Delaware, Georgia, Louisiana, Maine, Minnesota, Mississippi, Montana, New Hampshire, Rhode Island, South Dakota and West Virginia that were won by Republican president Richard Nixon in 1972 that elected Democrats to the United States Senate.

## Republican primary
### Candidates

* Jack Miller, incumbent Senator since 1961
* Ralph Scott

### Results

1972 Republican Senate primary :
| Party | Party | Candidate | Votes | % |
| | Republican | Jack Miller (incumbent) | 170,590 | 84.36% |
| | Republican | Ralph Scott | 31,607 | 15.63% |
| | Republican | All others | 11 | 0.01% |
| Total votes | Total votes | Total votes | 202,208 | 100.00% |

## General election
### Results

General election results :
| Party | Party | Candidate | Votes | % | ±% |
| | Democratic | Dick Clark | 662,637 | 55.07% | 17.27 |
| | Republican | Jack Miller (incumbent) | 530,525 | 44.09% | 16.82 |
| | American | William A. Rocap, Jr. | 8,954 | 0.74% | N/A |
| | Independent | Fred R. Benton | 1,203 | 0.10% | N/A |
| | Write-in | Write-in | 14 | 0.00% | N/A |
| Total votes | Total votes | Total votes | 1,203,333 | 100.00% | N/A |
| | Democratic gain from Republican | Democratic gain from Republican | Democratic gain from Republican | Democratic gain from Republican | Democratic gain from Republican |