Reagan's Daughter: Cognitive Tests For Presidential Candidates Would Be 'A Good Idea'

With polls showing voters' concerns over Biden's age, there are growing calls for him to prove his mental fitness ahead of a rematch with Trump.Michael Reynolds/EFE/ZUMA The daughter of the once-oldest president, Ronald Reagan, who was 77 when he took office, thinks cognitive tests for presidential candidates would be "a good idea," she said in an interview that aired Sunday. "Just what we know about what age can do, it doesn't always do that, but it would probably be a good idea," Patti Davis said on NBC's Meet the Press, in response to a question from host Kristen Welker about whether she agreed with the prospect. WATCH: When Ronald Reagan was elected at 69, he was the oldest person ever to be elected president. Now his daughter, Patti Davis, says cognitive tests would be a "good idea." Davis: "My father was 77 when he left office after two terms. It seems so young now, doesn't it?"