Tuesday is Donald Trump's 70th birthday. If he wins the election in November, that means he would be the oldest newly elected president in U.S. history, putting him ahead of Ronald Reagan, who was just shy of 70 on Inauguration Day 1981.
If Hillary Clinton were elected, she wouldn't be far behind. She will turn 69 in October. Come Inauguration Day 2017, that would put her not far behind Reagan when he was inaugurated, making her the second-oldest president.
Here's how those two candidates compare with America's past presidents: