1978Final results
1978 election for California's 18th District
U.S. House · California
William Thomas (R) won with 59.3% of the vote, defeating Bob Sogge (D) by 18.5 points.
William ThomasRepublican · winner
59.3%85,663
Bob SoggeDemocrat
40.7%58,900
144,563 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