Biden had a pretty good first half of the debate. He was on a roll when talking about foreign policy, and, to be honest, I think he benefited from Buttigieg taking on a lot of attacks from other candidates. But he had a rough back half of the night. He had some awkward phrasing ("punching") when talking about fighting for renewal of the Violence Against Women Act and then he appeared to forget/got mixed up with his words when he said that Carol Moseley Braun was the only black woman senator. Harris, on the stage with Biden, is obviously a black woman senator. Overall I think Biden did fine, not great.