So long as both the Congress and the State Legislature approves, any state can do that.
Hmm, if they get state legislature approval, I say Congress should let VT go: good bye Socialist Congressman, Patrick Leahy and 'jumpin' Jim'.
It's a small thing, but it makes our majorities larger. We could let MN go too, but the rest of the blue states we keep (though we can encourage California
to let the Bay Area seceed from the state and the Union, and we could let a few Indian reservations that vote demonRAT have full sovereignty.)