Republican Greg Lopez wins Colorado special election for Ken Buck’s seat 

Republican candidate Greg Lopez has won the special election to carry out the remainder of former Rep. Ken Buck’s (R-Colo.) term in Congress, according to Decision Desk HQ.  

Lopez, a former mayor of Parker, Colo., defeated Democrat Trisha Calvarese, who’s previously worked at the AFL-CIO and National Science Foundation, in the race to represent Colorado’s eastern 4th Congressional District until early January. November's election will decide who takes Buck's seat for the next full term.