Glenn joined CNN host Don Lemon Monday night, just hours after reports emerged Joe Biden had received President Obama's blessing for a 2016 bid. When Lemon brought up the topic of Mr. Biden running for president, Glenn responded as could be expected - with laughter.
"Joe Biden? That's a serious consideration?" Glenn said.
Lemon appeared to be doing his best to maintain a professional composure for his viewers as Glenn continued to chuckle.
“Joe Biden has a long track record in politics, he’s great on foreign policy, he’s a says-it-like-it-is guy,” Lemon said.
Glenn didn't agree.
"You cannot tell me he wouldn't be the laughing stock of the world," Glenn said. "Joe Biden? That's a joke. And all of us know, that's a joke."
Watch the exchange below. The Joe Biden conversation starts about halfway through.