You didn't need to go that far back in history to be honest, look at what Trump has done in his second term. Cutting off the access of millions to healthcare, deporting the family members of some who voted for him, cutting off access to the food stamp program, and passing one of the biggest tax heists in history from working people to the richest in society. All while his trade wars have done nothing to ease inflation and he has made hundreds of thousands unemployed. Not to forget the crypto scams he's been launching on his own supporters.
I'd say a lot of those Trump voters are now worse off than before.