Other protesters interrupted over the situation in Gaza.
Stephen Colbert, moderating the conversation, first asked what was at stake in the election.
But we also have a positive story to tell about the future.

Jason Bateman, Barack Obama, Will Arnett, Joe Biden, Sean Hayes and Bill Clinton at the taping of the Smartless podcast.Biden campaign
But people didnt feel it.
It takes a while to feel it.
So then he came and claimed it for everything.

Stephen Colbert moderates a conversation with Joe Biden, Barack Obama and Bill Clinton.Photo by BRENDAN SMIALOWSKI/AFP via Getty Images
Then all of a sudden, Joe Biden comes along and creates roughly twice as many jobs.
So I believe in keeping score not in a vindictive way, but in a positive way.
Hes been good for America and he deserves another term.
As the demonstrators interrupted, Colbert asked about the Gaza war.
Biden said, There are too many innocent victims, Israeli and Palestinian.
Weve got to get more food and medicine, supplies into the Palestinians.
But we cant forget, Israel is in a position where its very existence as at stake.
You have to have all those people.
Theyre prepared to fully recognize Israel … for the first time.
Colbert also got in a riff on Trumps boasts about winning his own golf clubs championship.
At long last, sir, have you no chip shot?
Biden answered, Look, Id be happy to play.
I told him this once before when he came into the Oval before he was sworn in.
I said, Ill give you three strokes but you carry your own bag.
Ive only played 21 holes since Ive been president.'
Toward the end, Colbert, Obama and Clinton donned aviators.
Biden said that he was a man who loves two things: Ray Ban sunglasses and ice cream.
By the way, the president said, Dark Brandon is real.
The campaign said that the event ended up bringing in more than $26 million.
The sum is larger than the entire amount that Trumps campaign raised in February.
At the event, Stephen Colbert will moderate a discussion with the three presidents.
Mindy Kaling will emcee.
The latter includes access to exclusive events and a photo with the three presidents.
The campaign said that Annie Leibovitz would be taking photos with some of the attendees.
Clinton is co-producer of the musical.