In the US, not disclosing a password is explicitly protected (5th amndmnt), SCOTUS has been clear. not so for biometrics, but so for PIN/passwd
That's great but of exactly zero help if you're trying to travel to the US and CBP (or ICE) are staring you down. Even if they don't gulag you, they can always just reject entry for any non-citizen (and these days even some citizens it seems.)
Or, a country could set rules that specify what they will and won't do as part of their entry controls. Just because it's a kind of an "absolute" power doesn't mean you can't still self-impose rules. The benefit being attracting more leisure and business travellers.
The constitution doesn't say shooting citizens is illegal, right?
At least 225 judges have ruled in more than 700 cases that the administration's mandatory immigration detention policy likely violates the right to due process[1] The Fifth Amendment's Due Process Clause generally requires those having federal funds cut off to receive notice and an opportunity for a hearing, which was not provided in many of DOGE's spending freezes[2]
(there's more but what's the point)1. https://www.justsecurity.org/107087/tracker-litigation-legal...
2. https://www.cbpp.org/research/federal-budget/many-trump-admi...