2012Final results
2012 election for U.S. Senate in Wisconsin
U.S. Senate · Wisconsin
Tammy Baldwin (D) won with 51.4% of the vote, defeating Tommy G. Thompson (R) by 5.5 points.
Tammy BaldwinDemocrat · winner
51.4%1,547,104
Tommy G. ThompsonRepublican
45.9%1,380,126
Joseph KexelLibertarian
2.1%62,240
Nimrod Y. U. Allen IIIOther party
0.5%16,455
3,009,411 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
Races before and after
Source: MIT Election Data and Science LabUpdated Sep 30, 2026, 7:25 AM ET
Money in this race
Each line compares the two campaigns on one scale.
Tammy BaldwinTommy G. Thompson
$15.1M
Raised by the campaign
$9.8M
$15.7M
Spent by the campaign
$9.8M
$143.9K
Cash on hand
$2.9K
Campaign money: FEC, through Dec 31, 2012.
Source: FEC campaign filingsUpdated Dec 31, 2012
The candidates
Tammy Baldwin (D)Tommy G. Thompson (R)
Also on the ballot: Joseph Kexel (Libertarian), 2.1%; Nimrod Y. U. Allen III (Other party), 0.5%