Vice President Biden said in an interview airing Sunday that he would not rule out running for president in 2016.

Biden, who is 68 years old and would be 73 on Election Day 2016, told CNN’s Candy Crowley that he’s not focused on his future plans, but that he’s not foreclosing another run of his own in five years either.

“I’ll make up my mind on that later,” Biden said during a swing through New Hampshire. “I’m in one of the — probably the best shape I’ve been in my life. I’m doing pretty well. I’m enjoying what I’m doing. And as long as I do, I’m going to continue to do it.”

Biden has run for president twice before, in 1988 and 2008. His first campaign had promise, but he suffered from staff problems and a plagiarism allegation; in his 2008 campaign, he was never really part of the top tier of candidates.

No presidential has ever been elected in their 70s. Ronald Reagan was the oldest, first taking the oath of office when he was 69. Sen. John McCain (R-Ariz.) was 72 on Election Day 2008, when he lost to President Obama.