2008Final results
2008 election for President in Idaho
President · Idaho
John McCain (R) won with 61.5% of the vote, defeating Barack H. Obama (D) by 25.4 points.
John McCainRepublican · winner
61.5%403,012
Barack H. ObamaDemocrat
36.1%236,440
Ralph NaderIndependent
1.1%7,175
Charles ""chuck"" BaldwinConstitution
0.7%4,747
Bob BarrLibertarian
0.6%3,658
655,122 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 2008
Races before and after
Source: MIT Election Data and Science LabUpdated Sep 30, 2026, 7:25 AM ET
The candidates
John McCain (R)Barack H. Obama (D)
Also on the ballot: Ralph Nader (Independent), 1.1%; Charles ""chuck"" Baldwin (Constitution), 0.7%; Bob Barr (Libertarian), 0.6%