1998Final results
1998 election for U.S. Senate in Idaho
U.S. Senate · Idaho
Mike Crapo (R) won with 69.5% of the vote, defeating Bill Mauk (D) by 41.1 points.
Mike CrapoRepublican · winner
69.5%262,966
Bill MaukDemocrat
28.4%107,375
George J. MansfeldNatural Law
2.1%7,833
378,174 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 1998
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.
Bill MaukMike Crapo
$243.3K
Raised by the campaign
$1.8M
$241.4K
Spent by the campaign
$1.6M
$1.1K
Cash on hand
$239.4K
Other candidates' campaigns: George J. Mansfeld $551.
Campaign money: FEC, through Dec 31, 1998.
Source: FEC campaign filingsUpdated Dec 31, 1998