Seems to be absolutely no basis for that assumption. His approval ratings are in the mid 40s, and the people that vote in primaries aren't exactly the waverers and independents that just wanted a change from Biden.
It could change when he properly tanks the economy, but association with Trump isn't likely to be a problem in primaries when you've got more than half a party's membership so immune to reality they'll insist that not only was Trump doing a good job of running the country in 2020, but he also won that election...
> Republican primary voters don’t seem to be upset.
Replying to both of you. It has started -> https://thehill.com/homenews/campaign/5214236-democrat-james...
The attacks members of Congress are troubling, but in a way don't matter too much: the deciders for control of the Senate or House are swing voters in swing states and districts. Whether or not the Republicans in Congress are MAGA adherents or older-school reasonable Republicans matters less than you'd think (and less than I'd like).
The one wrinkle in that is the Senate filibuster: if Democrats regain control there, depending on their margin, they could need up to 10 reasonable Republicans in order to make progress on most things. 60 Democratic Senators is unlikely.
What has Trump done to take away votes from people? Every election is still happening. US citizens are still able to vote.
The midterms could have some meaningful effect a lot sooner than that if we start seeing across-the-board primary challenges of pro-Trump Republicans. Of course, all of this is assuming that the broad Republican constituency have to some extent gone anti-Trump, and I really don't know how much basis there is for that assumption.