Gardner will be challenged by Hickenlooper in this fall's election for the Senate seat.
Gardner will be challenged by Hickenlooper in this fall's election for the Senate seat.
It may be the most controversial political ad to air so far this political season - an ad trying to influence undecided voters in..
Colorado voters have decided former Gov. John Hickenlooper will face incumbent Sen. Cory Gardner in the U.S. Senate race this..