Michael James Baumgartner is an American politician and diplomat serving as the 28th Spokane County Treasurer. A member of the Republican Party, he previously served as a member of the Washington State Senate, representing the 6th district from 2011 to 2019 and was his party's nominee in the 2012 election for the United States Senate, unsuccessfully challenging Democratic incumbent Maria Cantwell.

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%.