As leaders in Europe respond to once-unimaginable threats by the United States to take territory from a NATO ally, one US senator on Monday proposed legislation banning funding for any Trump administration military action against Greenland.

Sen. Ruben Gallego (D-Ariz.) put forth an amendment to the Senate Defense Appropriations bill “to prohibit the use of funds for military force, the conduct of hostilities, or the preparation for war against or with respect to Greenland,” a self-governing territory of Denmark.