 The 81-year-old failed at that, says Chris Galdieri, who's a professor of political science at St. Anselm College. The danger for Biden there is age is voters' biggest concern about him, and there was nothing last night that would make you say, oh, wow, this guy is, you know, strong as a knock. And with no fact-checking, former President Trump had a field day. He's running this sort of post-truth, post-fact candidacy.