1978Final results
1978 election for U.S. Senate in Idaho
U.S. Senate · Idaho
James McClure (R) won with 68.4% of the vote, defeating Dwight Jensen (D) by 36.9 points.
James McClureRepublican · winner
68.4%194,412
Dwight JensenDemocrat
31.6%89,635
284,047 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 1978
Races before and after
Source: MIT Election Data and Science LabUpdated Sep 30, 2026, 7:25 AM ET