Colorado Senate: Udall (D) 44%, Gardner (R) 42%
The Colorado Senate race remains a nail-biter going into the first debate between the two major candidates.
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The survey of 750 Likely Voters in Colorado was conducted on June 25-26, 2014 by Rasmussen Reports. The margin of sampling error is +/- 4 percentage points with a 95% level of confidence. Field work for all Rasmussen Reports surveys is conducted by Pulse Opinion Research, LLC. See methodology.