After Covid the recovery was K shaped. So the rich got richer and the poor got poorer. Trump was hammering out covid benefits, which actually helped a lot of people and before that the economy was doing well. A good bit of that was that Obama left it that way and the Republicans were divided enough to stop Trump from being as bad as he is today.

So a lot of them just looked back and saw that they did better under Trump then Biden and voted for Trump.

(Biden tried to do industrial policy, but that takes time, was delayed and money was spend baldy due to corruption. However the general plan was decent.)