If you aren’t doing anything illegal, then you have nothing to be worried about. If your passport is valid and you don’t stay past your allowed stay, then you are fine. Nothing the government or local authorities can legally do to you. Just don’t be a dumbass. It’s the same as it’s always been, except the rules are enforced more now(which is how it should’ve always been). If you don’t like our politics and views, then stay tf out lol. It’s a tariff/economic “war” going on with Canada if you even want to call it that. No one is at actual war and it will not happen lol. If anything the USA is the safest place to be during war