Colorado Senate candidate Ken Buck (R) has added his voice to the chorus of Republicans calling for gubernatorial candidate Dan Maes to step aside.

"After having a lengthy conversation with Dan Maes, it is clear to me that Dan is struggling to determine the best path for his campaign, his family and for Colorado," Buck said in a statement. "I have decided that I can no longer support his candidacy for governor of Colorado."

Buck joins former Sen. Hank Brown (R-Colo.), former GOP Senate candidate Pete Coors and former state Senate President John Andrews (R), who have all called for Maes to step aside.