it's actually insane that he's potentially throwing this election away lol he literally had it won. the odds have gone from like 1/20 on to almost even now.
It's like he's desperately trying to take advantage of the fact that Harris is a woman/minority, because he just has nothing else to attack. Historically and statistically, that's always been a disadvantage because a lot of voters are sadly racist/sexist (implicitly or explicitly), but we're kind of at a point now with this election where Harris being a member of a minority group is the least of the general public's concerns.
He's trying to speak to biases that are no longer relevant, and basically pull bigotry out of thin air. Yea, it still exists, but most of the people on the fence are more likely to be swayed by political competence and intelligent rhetoric that addresses issues that are actually relevant in our day to day lives than they are to be swayed by "haha, she's dark-skinned, obviously a DEI hire who doesn't know what she's doing".
Alleging that someone was installed on the basis of DEI rather than ability only works if you're actually more competent than them, or can at least make people think you are. It just doesn't work, not after COVID, not after Jan 6. His loyal supporters are as fervent as ever, if not more, but all of those swing voters, the people who voted him because it was "time for a different approach" are either not voting or voting for Harris at this point.