The exchange was testier than an earlier debate this week, as the Republican challenger, Joe O’Dea, attacked Senator Michael Bennet, a Democrat, as “ineffective” and Mr. Bennet branded his rival “a liar.”
“I’m going to win the election, and I will accept that result,” Kari Lake, a candidate for governor of Arizona, said on CNN. Evan McMullin said on NBC that he would never caucus with either party.
Senator Michael Bennet, a Democrat seeking re-election in Colorado, faces a challenge from Joe O’Dea, a novice Republican emphasizing more moderate positions in a break with his party.