Rep. Cory Gardner, R-Colo., a lawmaker who lost his health insurance because of Obamacare, will challenge Sen. Mark Udall, D-Colo., in this year's election.

“Last month, my wife, Jaime, and I received notice that our health care plan would be discontinued Dec. 31,” Gardner wrote in a September op-ed. “To comply with the myriad new regulations, requirements and mandates of the president's health care law, my family must find a new health care plan.”

Udall supports Obamacare, even pressuring Colorado state government officials about the number of health care plan cancellations that they reported took place because of the health care law.

"Sen. Udall says our numbers were wrong," Jo Donlin, director of external affairs for the state insurance division, wrote in a Nov. 14 email, the Denver Post reported. "They are not wrong. Cancellation notices affected 249,199 people. They want to trash our numbers. I'm holding strong while we get more details. Many have already done early renewals. Regardless, they received cancellation notices."

Now, the Post reports that Gardner has decided to jump in the race against Udall. The Greeley Tribune adds that Ken Buck, who lost a 2010 Senate bid, will drop out of the Republican Senate primary and instead seek Gardner's current seat.