Notes from my Greenland research:

According to Articles 51 and 52 of the UN - 1969 Vienna Convention (VCLT):

No one can force a country to sit at the settlement table. Otherwise that agreement will be invalid.

Denmark approved it in 1976.

USA signed it in 1970, but it wasn’t approved by the Senate.

The USA will evaluate the agreement through customary international law.

This means bypassing Articles 51 & 52 a clear sign of why Trump disregards international law. (1/2)