Two groups bought almost $850,000 in ads on Spanish-language channels in Denver and Colorado Springs.
The anniversary of last year’s devastating floods has become a talking point in Colorado's U.S. Senate campaign.
The law Rep. Cory Gardner touts in a campaign ad for his Senate bid was repealed five years later after being deemed useless.
In an attempt to woo female voters, Democrats have long chided Republican candidates on the issues of abortion and birth control. One group says that’s a losing strategy.
U.S. Sen. Mark Udall, who is locked in a bitter re-election battle with Republican U.S. Rep. Cory Gardner, did not join Obama on stage or at a later fundraiser.
When Democrats took control of Colorado's statehouse, they pushed through gun control, civil unions and environmental bills. Then voters pushed back, and Sen. Mark Udall is feeling the fallout.
Hill becomes the 3rd republican to drop out of the Senate race after Gardner announces run
Colorado's Senate seat could be the key to which party controls Congress next year.