Rep. Mark Udall (D) led former Rep. Bob Schaffer (R) by 8 points in the race for the Centennial States open Senate seat, according to an independent poll conducted Sept. 14-21.
Including undecided voters who were leaning in one direction or the other, Udall topped Schaffer 48 percent to 40 percent. Udall has held similar advantages in most polls taken to gauge the state of the race.
The poll, conducted jointly by Quinnipiac University, the Wall Street Journal and Washingtonpost.com, surveyed 1,418 likely voters and had an error margin of 2.6 points.
In the presidential race, Sen. Barack Obama (D-Ill.) led Sen. John McCain (R-Ariz.) in Colorado, 49 percent to 45 percent. These numbers also included undecided voters who said they were leaning toward supporting one of the two candidates.