Would you be surprised at all if there was a re-emergence of slavery in the United States?

There are slaves, just low numbers because it's illegal. There's also a lot of working arrangements with illegal immigrants that look very similar in a bad light.

In fairness most western countries have a low level of slavery - they found some forced labour on a farm in Australia a few years back for example.

If you're asking if any US state wants to legalise slavery, it's extremely unpopular everywhere, except in a few niche pointy white hat communities.