FriendOfDeSoto@startrek.website 2 days ago
Constitutionally, it is spelled out in Article I, Section 10, Clause 1:
No State shall enter into any Treaty, Alliance, or Confederation; grant Letters of Marque and Reprisal; coin Money; emit Bills of Credit; make any Thing but gold and silver Coin a Tender in Payment of Debts; pass any Bill of Attainder, ex post facto Law, or Law impairing the Obligation of Contracts, or grant any Title of Nobility.
So foreign policy is principally a federal government domain, established by cases heard by the Supreme Court. constitution.congress.gov/…/ALDE_00001097/
There is a somewhat gray zone where neighbors can talk to each other on the state level, e.g. Maine and Quebec. But they will find themselves restricted by what the governments one step up have decided. I think certain states also are on friendly terms with other nations, probably to deepen economic ties. But that’s more on the level of a city friendship than actual foreign policy.
NateNate60@lemmy.world 2 days ago
There is no limit in the Constitution that prohibits individual US states from exchanging representatives with foreign countries or from expressing or sending support to them. However, there are some caveats, of course, and it’s a very nuanced area of law that has interesting implications: