2018Final results
2018 election for U.S. Senate in Wisconsin
U.S. Senate · Wisconsin
Tammy Baldwin (D) won with 55.4% of the vote, defeating Leah Vukmir (R) by 10.8 points.
Tammy BaldwinDemocrat · winner
55.4%1,472,914
Leah VukmirRepublican
44.6%1,184,885
2,657,841 votes
Source: MIT Election Data and Science LabUpdated Oct 1, 2026, 6:17 AM ET
The seat over time
D − R margin in this seat's races around 2018
Races before and after
Source: MIT Election Data and Science LabUpdated Oct 1, 2026, 6:17 AM ET
Money in this race
Each line compares the two campaigns on one scale.
Tammy BaldwinLeah Vukmir
$27.8M
Raised by the campaign
$5.9M
$28.7M
Spent by the campaign
$5.8M
$142.2K
Cash on hand
$42.4K
Campaign money: FEC, through Dec 31, 2018.
Source: FEC campaign filingsUpdated Dec 31, 2018