In polling, 75% of Trump supporters want to repeal Obamacare even though they are mostly the poor beneficiaries. If you ask the exact same question without calling it "Obamacare" that drops to 13%http://www.salon.com/2016/12/21/drain-the-swamp-of-all-those-p-c-liberals-turns-out-trumpers-dont-care-about-lobbyists-or-plutocrats/
Those fighting against the USs fledgling ability to catch up with the rest of the civilised world and look after people who are ill are able to keep popular support against it by reminding people it was proposed by a black man.
In Kentucky, they even rebranded it so that those in need would take it up: http://www.vox.com/science-and-health/2016/12/13/13848794/kentucky-obamacare-trump
It's only after reading comments against various Obamacare articles that I understand (though disagree) with the opposition to it from poor white Americans. The rebranding of ACA as "Obamacare" is a racist issue THAT makes it sound like healthcare for poor black people, paid for by increased premiums to wealthy whites.