Socialist, a very broad category, care for other people. Who would want to remain outside its canopy?
In the US? A distressingy high number pf people, mostly "conservatives". The US can be almost phobic about Socialism. I don't know why. Even though pure Socialism isn't the be-all-end-all, there are still aspects of a socialist society does actually work pretty well.
It's also a bit ironic seeing as the US has been steadily moving in a direction towards Fascism (a form of socialism) for decades.