During an interview on “Real Time with Bill Maher,” Senator Bernie Sanders made a special appearance to discuss the 2016 election, and in particular, the upcoming California primary.

Maher questions Sanders about what sort of polling percentage between Clinton and Trump would serve as the “tipping point” before Superdelegates might consider abandoning Clinton.

Sanders replied that Superdelegates have a duty to take a hard look at the chances of Clinton beating Trump based on polls which show the Republican candidate gaining and even surpassing Clinton.

Watch