 The main concern or one of the main concerns we've seen over and over when it comes to Biden, and that is his age. This is a Gallup poll just before the debate and already going into the debate. Sixty seven percent of voters said they considered Biden too old to be president. That's 30 points higher than the number for Donald Trump. And just take a look at the other oldest nominees in history. John McCain in 2008, Dole 96, Reagan in both of his campaigns.