By the numbers, from Noah Rothman:
An Economist/YouGov survey released this spring revealed that Biden’s favorability rating among black voters is comparable to Clintons (46 percent describe their feelings toward the vice president as “very favorable” compared with 45 percent who say the same for Biden.
That same survey found Biden is viewed favorably by 42 percent of women compared with Clinton’s 55 percent, but Clinton has seen her appeal toward women crater in the intervening months. YouGov’s latest survey, released last week, shows Clinton’s favorably among women collapsing to 45 percent while another 45 percent view her negatively. Whereas 52 percent of voters age 18 – 29 viewed Clinton favorably in the spring, only 40 percent feel the same today. Just 7 percent of younger voters described their views toward Clinton as “very favorable.”
Considering the fact that the GOP nominee is almost certain to be younger than Clinton on Election Day, the Democrats’ “coolness deficit” is going to be especially acute. The party that has spent the better part of the last decade manufacturing a celebrity cult of personality around Barack Obama is on the verge of an identity crisis perhaps best typified by the tortured liberal effort turn the “notorious” octogenarian Supreme Court Justice Ruth Bader Ginsburg into a rock star. But unlike Hillary Clinton, who never fails to project coldness and insincerity, Joe Biden is a natural retail campaigner and a figure that effortlessly connects with his audience.
The best argument in favor of a Biden run is watching Hillary go into Permanent Eye Roll mode.