[[File:2010 United States Senate Republican primary in Idaho results map by county.svg|thumb|160px|Republican primary results by county {{legend|#e27f7f|Crapo}} {{legend|#d72f30|70–80%}} {{legend|#c21b18|80–90%}} ]] [[File:2010 United States Senate Democratic primary in Idaho results map by county.svg|thumb|160px|Democratic primary results by county {{legend|#7996e2|Sullivan}} {{legend|#7996e2|50–60%}} {{legend|#6674de|60–70%}} {{legend|#584cde|70–80%}} {{legend|#3933e5|80–90%}} ]] The 2010 United States Senate election in Idaho took place on November 2, 2010, alongside 33 other elections to the United States Senate in other states as well as elections to the United States House of Representatives and various state and local elections. Incumbent Republican U.S. Senator Mike Crapo won re-election to a third term.

Republican primary

Candidates

Results

Democratic primary

Candidates

Results

General election

Candidates

Campaign

Sullivan, a heavy underdog, criticized Crapo for being in Washington for too long, saying, "Senator Crapo has been in Congress for 18 years. The country is struggling, and I think it's time to make a change." Crapo emphasized his conservative record in Washington.

Debates

Predictions

Polling

Fundraising

Results