what does that look like, then? >> it's a good question. the interesting thing coming out of his camp is he doesn't really do debate prep. he doesn't do -- he doesn't do mock debates. i think that's a fascinating wild card in tonight's debate. and how he deals with -- how do you deal with the moderator questions that are critical. how do you deal with the back and forth with other candidates? i think the challenge for all of these candidates tonight is not just bernie sanders, is to appear presidential. the advantage -- >> what does that look like? is that just a word we use? >> and i think it really is having stature. if you look at the debates in 2008, and there wasn't a debate hillary clinton didn't come across as having the stature to be president of the united states, and i think there's no doubt she'll sxibt that again tonight. we don't know about the other candidates, we don't know about bernie sanders. we haven't seen them in this type of debate. i think stature is a big issue. really right now, if you look at the way this campaign has played out, the differences on the