That would assume Trump is WAY smarter than he appears to be. Dude is just a rich, racist, old, dementia laden asshole with some skills at manipulating people. In his mind, and the mind of his supporters, universal healthcare is the worst possible thing because it would mean all those minorities wouldn't die so quickly AND we'd have to tax the rich more.

People like this are their own worst enemy because their ideology mostly attracts stupid, incompetent people. Also, since people like Trump demand loyalty above all else, they boot many of their smarter supporters because they have WAY too much independent thought and are either a threat or don't instantly ask how high when the boss says jump. And, in practice, the ideology is abhorrent to most of the population, even many of it's supporters. It's always a "I thought the leopards would eat OTHER people's faces" type thing.