Of the handful of extremely close U.S. Senate races this year, the battle over the Colorado seat being defended by Democratic Sen. Mark Udall is one of the closest, mirroring the sharply divided politics of the state. Forty-two percent of Coloradans in the first half of 2014 identified as or leaned Republican and 42% identified as or leaned Democratic. CONT.
Lydia Saad, Gallup