Ninety-four-year-old former President Jimmy Carter says he doesn't believe he could have managed the most powerful office in the world at 80 years old.
Carter didn't tie his answer on Tuesday to any of his fellow Democrats running for president. But two leading 2020 candidates, Joe Biden and Bernie Sanders, would turn 80 during their terms if elected. Biden is 76. Sanders is 78.
Carter's remarks came during his annual question-and-answer sessions at the Carter Center in Atlanta.
The 39th U.S. president was 56 when he left office in 1981.
Carter says he voted for Sanders in the 2016 primary. He says he's undecided now but will vote for the Democratic nominee against President Donald Trump.
