 We'll take more callers on this issue as well. Here's some eye-popping numbers for you. 72% don't think Biden has the mental and physical strength to be president. This is scaring the bejeebers. It is scaring the bejeebers out of the Democrat Party. 72% of registered voters don't believe Biden has the mental and the cognitive health necessary to serve as president as he continues to trail Donald Trump, according to two new polls.