At a time when President Trump and the three Democratic presidential candidates leading in the polls to be the party's 2020 nominee against him are all age 70 or older, former President Jimmy Carter is suggesting that, quote, "there's an age limit" to be president. Speaking during his annual report at the Carter Center on Tuesday (September 17th), the 94-year-old Democrat said he couldn't have done the job of president at 80 years old. Carter served as president from 1977 to 1981 when he was in his 50s. However, Carter has said that he voted for Senator Bernie Sanders in 2016, when Sanders was 75 years old. He hasn't decided who he'll vote for in the 2020 primary. Sanders, who's running again, is now 78. Trump, who was the oldest newly-elected president in 2016, is 73, former Vice President Joe Biden is 76, and Senator Elizabeth Warren is 70. If either Biden or Sanders were to win the presidency, they would turn 80 while in office.