Could US Congress stop Trump from taking over Greenland?

President Trump's aggressive pursuit of Greenland has created an unusual rift with Congressional Republicans, who are joining Democrats in opposing what they view as a potential violation of international law and threat to NATO unity. While Trump insists acquiring Greenland is necessary for national security to counter China and Russia in the Arctic, lawmakers from both parties are concerned about his unilateral use of military and economic force abroad, despite his 2024 campaign promises to reduce foreign entanglements. Congress holds constitutional powers over funding and treaty ratification that could theoretically block a Greenland acquisition, though Trump's administration has shown willingness to expand executive authority on other issues.