> It's just shocking to me how certain demographics are so eager to vote against their own interests.

Something that's been made very clear over the last few election cycles is that a lot of voters will go against their own interests, as long as it hurts their perceived "enemy" more than themselves.

Right. This article discusses how race plays a central role in the opposition to universal health care policies like Obamacare, particularly focusing on how some of the resistance in the South is due to white populations not wanting Black Americans to receive free care: https://www.nytimes.com/interactive/2019/08/14/magazine/univ...

But only one side does this?