Vermont Sen. Bernie Sanders made a valedictory appearance on Bill Maher‘s “Real Time” on Friday night one day after the Democratic National Convention in which he fell short of his goal of becoming the party’s presidential nominee.

“I think what comes out of that convention, Bill, is the understanding that Donald Trump is the most dangerous presidential candidate in the modern history of this country and he must be defeated,” Sanders told the HBO host and longtime Sanders supporter.

“And I say that, Bill, not just because of his absurd views on so many issues — you know, he believes climate change is a hoax, he wants to give hundreds of billions of dollars in tax breaks to the top 1 percent,” the senator said. “But above and beyond all of that, this guy is trying to run his entire campaign based on bigotry.”

Also Read: Bill Maher Spoofs What We Don't Know About Hillary Clinton: 'My Secret Service Name Is Nutcracker'

“This is guy who is dangerous,” he said. “This is a guy who must be defeated.”

Maher praised Sanders for gracefully step aside. “You are a warrior, sir,” Maher said. “And the hardest thing for a warrior to do is to fall on his sword, and you did.”

Sanders noted that he was taking the long view. “Fundamental changes, transformational changes, take time to happen,” he said. “What we are doing, by the way, is converting our movement from a presidential campaign to a movement that tries to activate the American people and get young people to start running for office for school board and city council and state legislatures.”

Also Read: Clinton, Sanders Delegates Fought During 'What the World Needs Now Is Love'

Maher pressed Sanders on whether he’d consider running for the White House again despite being 74 now. “There is no reason why you can’t run again,” the host noted.

“Four years from now is a long time,” Sanders replied, indicating that he intended to run for re-election to his Senate seat in two years.

“You’re not too old to run again,” Maher repeated. “Think about it.”