2012Final results

2012 election for U.S. Senate in Washington

Name: 2012 election for U.S. Senate in Washington
Start: 2012-11-06
Location: Washington

U.S. Senate · Washington

Maria Cantwell (D) won with 60.5% of the vote, defeating Michael Baumgartner (R) by 20.9 points.

Maria CantwellDemocrat · winner

60.5%1,855,493

39.5%1,213,924

3,069,417 votes

Source: MIT Election Data and Science LabUpdated Sep 30, 2026, 7:25 AM ET

The seat over time

D − R margin in this seat's races around 2012

Source: MIT Election Data and Science LabUpdated Sep 30, 2026, 7:25 AM ET

Each line compares the two campaigns on one scale.

Maria CantwellMichael Baumgartner

$9.4M

Raised by the campaign

$1M

$9.2M

Spent by the campaign

$1M

$754.3K

Cash on hand

$33.9K

Campaign money: FEC, through Dec 31, 2012.

Source: FEC campaign filingsUpdated Dec 31, 2012