WASHINGTON ― Vice President Joe Biden left the door open Sunday to running for president in 2020.

Biden would be 78 that year, while President-elect Donald Trump would be 74.

“Age could be very much an issue, and it may not be. It depends on the state of my health and the health of whomever is running,” Biden said in an interview with Jake Tapper on CNN’s “State of the Union.”

“Four years is a lifetime in American politics, and I think that nominees are determined by their parties based mostly on what skill set is most needed at that time,” Biden said. “And who knows where we’re going to be two years from now when people really start looking seriously at what they’re going to do.”

Biden told reporters Monday that he was “not committing not to run.”

“I’m not committing to anything,” he said. “I learned a long time ago fate has a strange way of intervening.”

Biden said in the interview airing Sunday that he’s not sure he could’ve done a better job than Hillary Clinton in the 2016 race.

“I don’t know, they probably would’ve eaten me alive, who knows what would have happened,” Biden said.

But Biden added that the Democratic Party needs to do a better job speaking to people who have been “left behind” in the new economy. Globalization has not benefited everyone, he said.

“There are ways to deal with that, but we never got a chance to speak to it in this election, and I think we paid a price for it in this election,” Biden said.