Look, it’s tempting to get all CNN-y and speculate—what if his polling is predicting a loss! But it’s just as likely that, I don’t know, he just remembered that ABBA broke up and has repeatedly asserted that it will never reunite again, even though that would be dope as hell.
Sanders tends to be a little bit more muted when he’s not on the stump—and especially so when he’s not talking about inequality—and his family tends to mellow him out. But Bernie not only seems down, he’s talking about his campaign in the past tense, which doesn’t bode well. (Or maybe Sanders is just watching CNN’s coverage, which is mostly pundits breathlessly questioning his viability as a candidate without citing any evidence whatsoever.)