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2008 Colorado U.S. Senate Election

Colorado · 4 candidates · See every 2008 U.S. Senate race

Who won the 2008 Colorado U.S. Senate Election?

Mark Udall won the 2008 Colorado U.S. Senate Election. Mark Udall received 1,230,994 popular votes (52.8%). The main challenger was Bob Schaffer (42.49%).

See the full head-to-head between Udall and Schaffer

Udall +10.3 pts · won by 240,239 votes
Mark UdallDemocraticWINNER52.8%
1,230,994 votes
Bob SchafferRepublican42.49%
990,755 votes
Douglas Dayhorse CampbellAmerican Constitution Party2.56%
59,733 votes
Bob KinseyGreen2.14%
50,004 votes
Popular-vote totals for U.S. Senate elections come from the MIT Election Data and Science Lab (1976–2024).

Data last verified July 28, 2026.