@Lkdc Outside of a civil war, I do not see any way to stop an invasion of #Greenland 🇬🇱 within the United States 🇺🇸.
The President can legally attack any country for any reason using any weapon (including nukes) for up to 90 days.
#Denmark 🇩🇰 should request nuclear protection from #France 🇫🇷 & the #UnitedKingdom 🇬🇧—which should be enough of a deterrent to keep Greenlanders safe from an American invasion.