There have to be some limits to that. If there's a democratic vote of the people called, and 50+1% of the people who bother to vote decide to reintroduce slaver

There have to be some limits to that. If there's a democratic vote of the people called, and 50+1% of the people who bother to vote decide to reintroduce slavery (beyond the current loophole in the 13th Amendment regarding criminal sentences that allows e.g. mandatory prison labor), I'm glad that any judge in the country would strike that down.