[impossiblefork]

Think like this: in the US you can fire someone for almost any reason, except if it's one of certain forbidden reasons.

Similarly, the US government can revoke someone's visa, but they can't revoke someone's visa because of speech protected by the first amendment.

[Gareth321]

This makes sense but then the outcome of this is all theatrical. What will happen in future is that people have their visas revoked without any comments or reason given. There is no legal requirement to list a reason. It will end up the same as employment law, where people can discriminate and break the law as long as they don't tell the applicant they are doing so.

[impossiblefork]

Yes, of course this won't have any practical effect, unless people are writing everything down, which I, however, think they often are.