2012 United States Senate election in Washington

The 2012 United States Senate election in Washington took place on November 6, 2012, concurrently with the 2012 U.S. presidential election as well as other elections to the United States Senate and House of Representatives and various state and local elections. Incumbent Democratic U.S. Senator Maria Cantwell won re-election to a third term by a significant margin, outperforming President Barack Obama's margin in the concurrent presidential election by 6%.

Background
Maria Cantwell won re-election to serve a second term with 56.81% of the vote against Mike McGavick in the 2006 Washingtonian U.S. senatorial election.

Democratic

 * Maria Cantwell, incumbent U.S. Senator
 * Timothy Wilson

Republican

 * Michael Baumgartner, state senator
 * Art Coday, physician
 * Chuck Jackson, merchant mariner
 * Mike the Mover, perennial candidate
 * Glen R. Stockwell, president of Washington State Economic Development Corporation

Declined

 * Bill Bryant, Port of Seattle Commission President
 * Clint Didier, former NFL football player (endorsed Coday)
 * Doc Hastings, U.S. Representative
 * Jaime Herrera Beutler, U.S. Representative
 * John Koster, Snohomish County Councilman and candidate for the 2nd congressional district in 2010 (running for the U.S. House)
 * Cathy McMorris Rodgers, U.S. Representative
 * Dave Reichert, U.S. Representative
 * Phillip Yin, Hong Kong-based anchor for Bloomberg Television

Others

 * Will Baker (Reform Party)

Results
[[File:2012WASENprimary.svg|thumb|250px|Results by county: {{legend|#7996e2|Cantwell}}

{{legend|#bdd3ff|30–40%}}

{{legend|#a5b0ff|40–50%}}

{{legend|#7996e2|50–60%}}

{{legend|#6674de|60–70%}} {{legend|#e27f7f|Baumgartner}}

{{legend|#ffb2b2|40–50%}}

{{legend|#e27f7f|50–60%}} ]]

Candidates

 * Michael Baumgartner (Republican), state senator
 * Maria Cantwell (Democratic), incumbent U.S. Senator

Debates

 * Complete video of debate, October 12, 2012 - C-SPAN

Polling

 * Aggregate polls

Counties that flipped from Republican to Democratic

 * Yakima (largest city: Yakima)

Counties that flipped from Democratic to Republican

 * Asotin (largest city: Clarkston)
 * Spokane (largest city: Spokane)
 * Whitman (largest city: Pullman)

By congressional district
Cantwell won 8 of 10 congressional districts, including two that elected Republicans.