2010Flipped from DemocraticFinal results
2010 election for U.S. Senate in Wisconsin
U.S. Senate · Wisconsin
Ron Johnson (R) won with 51.9% of the vote, defeating Russell Feingold (D) by 4.8 points, a seat Democrats won last time.
Ron JohnsonRepublican · winner
51.9%1,125,999
Russell FeingoldDemocrat
47.0%1,020,958
Rob TaylorConstitution
1.1%23,473
Ernest J. Pagels Jr.Republican
0.0%134
Michael D. LaforestIndependent
0.0%129
2,170,693 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 2010
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.
Russell FeingoldRon Johnson
$13.9M
Raised by the campaign
$15.5M
$15.5M
Spent by the campaign
$15.3M
$919.6K
Cash on hand
$192.6K
Other candidates' campaigns: Rob Taylor $8.9K · Ernest J. Pagels Jr. $2.5K.
Campaign money: FEC, through Dec 31, 2010.
Source: FEC campaign filingsUpdated Dec 31, 2010
The candidates
Ron Johnson (R)Russell Feingold (D)
Also on the ballot: Rob Taylor (Constitution), 1.1%; Ernest J. Pagels Jr. (Republican), 0.0%; Michael D. Laforest (Independent), 0.0%