FILE - In this Sept. 12, 2014 file photo, U.S. Sen. Mark Udall, D-Colo., speaks during a joint news conference with Trout Unlimited by the shore of the St. Vrain Creek, which was disastrously flooded a year earlier, in Lyons, Colo. According to a new poll released Thursday, Sept. 18, 2014, Republican challenger Cory Gardner is leading Udall in Colorado by 8 points. The Quinnipiac University Poll contrasts with two other independent polls released earlier this month that found Udall tied or slightly ahead in the race. (AP Photo/Brennan Linsley, File)
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