I think that's kind of an interesting dynamic. One one hand, if you have >50% of hash rate in the US, then you have a ~$5 billion/yr industry that at least some politicians are going to want to keep happy. On the other hand, if the censorship is egregious, either the value of BTC is going to drop (contracting the industry) or some users are going to switch to a new PoW function (possibly decimating the industry). It's kind of the same dynamic you get from regulating industry in general, e.g. raising local minimum wage, but the feedback loop in Bitcoin is currently much faster than most industries, so the same politician who's in power when the problem is created is likely to still be in power when the problem manifests.