U.S. Rep. Ken Buck's resignation in the 4th Congressional District is the first time a Colorado U.S. House district has been vacant for so long in more than 40 years.

Buck claims his resignation stems solely from his growing frustration with congressional inaction; however, the move is negatively impacting one of his colleagues, Congresswoman Lauren Boebert.

Republican Rep. Ken Buck, ... "It has been an honor to serve the people of Colorado's 4th District in Congress for the past 9 years," Buck said in a statement.

For the first time since announcing he's leaving Congress, Rep. Ken Buck, a Republican who represents Colorado's 4th Congressional District, is talking about why he moved up his departure date.

Some Colorado voters will soon get to select Colorado's 4th Congressional District representative who will fill a vacant seat. Former Republican Rep. Ken Buck left his position on March 22 ...

Republican candidates vying to succeed former U.S. Rep. Ken Buck in the 4th Congressional District will debate tonight. Watch it here: 9NEWS and Colorado Politics are hosting the debate among six ...

The retirement of Republican Congressman Ken Buck leaves the state’s most conservative congressional seat open for the first time in a decade.. On the Republican side of the race to fill it is ...

Former Rep. Ken Buck (R-Colo.) reflected on his time in Congress and ultimate decision to resign earlier this year in an interview Monday, saying there’s more to life than “arguing.&#82… ...