imagine at this point in time. hillary is such a dominant candidate that she has something like 124 endorsements from the house of representatives. it would be an extraordinary lead in the primary and it would be an extraordinary achievement for biden to come from behind and beat that. >> isn't that, however, what senator obama did in 2008 when he first announced in 2007 he had a 16%, lower, even, than where joe biden is? >> it's true, but it wasn't as dominant as it is in 2015-2016. i just think for biden, it's already so late, right? he has to ramp up a campaign from scratch, and it's almost september before the election year. i think he also has to make a persuasive case that he's offering something different to the party than clinton is. sanders can maybe make that case, but biden, it's not clear what he's offering other than perhaps he doesn't have an e-mail scandal going drip, drip