The two charts above reflect the problem Donald Trump is having among his most loyal 2016 voters -- those age 65 and over. When he squeaked out his win in 2016, he did so with double-digit support from older voters. But if the election was being held today, that would not happen.
The Quinnipiac University Poll (top chart), done between May 14th and 18th, has him trailing Joe Biden by 10 points.
The Economist / YouGov Poll (bottom chart), done between May 17th and 19th, Has him 1 point ahead of Biden.
If either of the polls is true, it would be disastrous for Trump's chances of re-election. Trump trails badly among women and younger voters, and he needs to repeat his large margin among those 65 and older if he's to have any chance of winning.