2020Final results
2020 election for Idaho's 2nd District
U.S. House · Idaho
Mike Simpson (R) won with 64.1% of the vote, defeating C. Aaron Swisher (D) by 32.3 points.
Mike SimpsonRepublican · winner
64.1%250,669
C. Aaron SwisherDemocrat
31.7%124,151
Pro-LifeConstitution
2.2%8,573
Idaho Sierra LawLibertarian
2.0%7,940
391,333 votes
Source: MIT Election Data and Science LabUpdated Oct 1, 2026, 10:09 AM ET
The seat over time
D − R margin in this seat's races around 2020
Races before and after
Source: MIT Election Data and Science LabUpdated Oct 1, 2026, 10:09 AM ET
Money in this race
Each line compares the two campaigns on one scale.
C. Aaron SwisherMike Simpson
$74.7K
Raised by the campaign
$1M
$74.3K
Spent by the campaign
$1.1M
$7.9K
Cash on hand
$176.3K
Campaign money: FEC, through Dec 31, 2020.
Source: FEC campaign filingsUpdated Dec 31, 2020
The candidates
Mike Simpson (R)C. Aaron Swisher (D)
Also on the ballot: Pro-Life (Constitution), 2.2%; Idaho Sierra Law (Libertarian), 2.0%