1978Final results
1978 election for U.S. Senate in Colorado
U.S. Senate · Colorado
William Armstrong (R) won with 58.7% of the vote, defeating Floyd K. Haskell (D) by 18.4 points.
William ArmstrongRepublican · winner
58.7%480,801
Floyd K. HaskellDemocrat
40.3%330,148
Vedder V. DronOther party
0.7%5,789
John ShueOther party
0.3%2,518
819,256 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
The candidates
William Armstrong (R)Floyd K. Haskell (D)
Also on the ballot: Vedder V. Dron (Other party), 0.7%; John Shue (Other party), 0.3%