2018Flipped from DemocraticFinal results
2018 election for U.S. Senate in Indiana
U.S. Senate · Indiana
Mike Braun (R) won with 51.0% of the vote, defeating Joe Donnelly (D) by 6.4 points, a seat Democrats won last time.
Mike BraunRepublican · winner
51.0%1,151,904
Joe DonnellyDemocrat
44.6%1,008,030
Lucy M. BrentonLibertarian
4.4%99,732
Nathan AltmanOther party
0.0%7
2,260,551 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.
Joe DonnellyMike Braun
$14.6M
Raised by the campaign
$19.8M
$15.8M
Spent by the campaign
$19.6M
$173.9K
Cash on hand
$71.6K
Other candidates' campaigns: Nathan Altman $50.1K.
Campaign money: FEC, through Dec 31, 2018.
Source: FEC campaign filingsUpdated Dec 31, 2018
The candidates
Mike Braun (R)Joe Donnelly (D)
Also on the ballot: Lucy M. Brenton (Libertarian), 4.4%; Nathan Altman (Other party), 0.0%