 Donald Trump has now opened a six-point lead over President Biden among voters nationally. 80% say Joe Biden is too old to run for a second term. 80%. You can't get 80% of Americans to agree on the moon landing, but 80% of Americans agree that Joe Biden is too old to be president because it is more self-evident than either of the other two. Trump's lead over Biden in a two-person matchup is 48-42. It is the widest in general surveys dating to late 2021.