Actually and very obviously, what's happening now is new and worse.
My math teacher used to say that “obviously” means “I don’t know how to prove” and “trivially” means “tenuously at best”. Thanks for the demo of this in action.
It’s been a thing since 1789: https://en.wikipedia.org/wiki/Border_search_exception
Enough alarm bells are ringing to suggest that this is not normal. The persecution of political enemies isn't even a veiled threat, they are spoken outright in public.