Jon Stewart says Biden is so old he 'shouldn't be president'

• Jon Stewart says Joe Biden, 81, is just too old to be president.
• "When you watch him on television, you're nervous, aren't ya?" Stewart said on Friday.

A second Trump term may be frightening, but President Joe Biden is just too old to be reelected, says comedian Jon Stewart.

"I know liberals say, 'Don't say Joe Biden is old' — don't say what people see with their own eyes," Stewart said of the 81-year-old president. "I know you know how fucking old he is, and I know you don't want to say it because Trump is so scary, but he's so fucking old."

"When you watch him on television, you're nervous, aren't ya?" Stewart continued.

"The Daily Show" host offered his assessment on Biden and his rival, former President Donald Trump, 77, on Friday while performing at this year's Netflix Is a Joke Festival, per The Hollywood Reporter.

"I'm not saying that Biden can't contribute to society, he just shouldn't be president," Stewart told his audience.

Putting both Biden and Trump on the ballot, Stewart said, was a mistake.

"Why are we allowing this? And now we're going to have a president that's the two oldest people that have ever run for the office of the presidency," Stewart said earlier in his segment.

This isn't the first time Stewart has commented on the upcoming presidential election. When Stewart made his return to "The Daily Show" in February, the late-night host questioned Biden's and Trump's fitness for the Oval Office.

"These two candidates. They are both similarly challenged," Stewart said on February 12. "And it is not crazy to think that the oldest people in the history of the country to ever run for president might have some of these challenges."

Both Biden and Trump will make history no matter who prevails in this year's presidential election.

If Biden wins, he would be 82 years old on Inauguration Day and 86 by the time he leaves office. Likewise for Trump, who will become oldest person ever to be inaugurated if he beats Biden. Trump will turn 78 on June 14.

But criticisms about Biden's age hasn't dulled the octogenarian's confidence in his campaign. In fact, Biden says his age is actually an asset for his candidacy.

"I have acquired a hell of a lot of wisdom and know more than the vast majority of people. And I'm more experienced than anybody that's ever run for the office," Biden told MSNBC in May.

Representatives for Stewart, Biden, and Trump didn't immediately respond to requests for comment from BI sent outside regular business hours.

Stewart's remarks about Biden and Trump come months before the November polls, with the two presumptive nominees now locked in an intense fundraising battle.

Biden's campaign revealed last month that it raised more than $90 million in March. The campaign accumulated over $187 million in donations in the first quarter of this year.

And on Saturday, Trump's team told donors they raised more than $76 million in April, Politico reported, citing a person familiar with the matter.