 It goes with what I've been saying back in February. The numbers were a lot better for Biden. But now here we are in, well, July 1st. And a lot of people saying, no, he should not. The more Americans see of Joe Biden, the less confidence they have in him. Why shouldn't Joe Biden be running for president? Top answers. Voters who don't think that he should. Eighty six percent said it's because of his age.