Former U.S. President Donald Trump has intensified his efforts to acquire Greenland, reiterating threats to impose tariffs on any countries that oppose the United States taking control of the autonomous Danish territory. He has consistently framed Greenland as an absolute necessity for U.S. national and economic security, citing its strategic location for monitoring Russian and Chinese military activity in the Arctic and its rich natural resources. Trump's initial interest in purchasing Greenland surfaced in 2019, which Denmark and Greenland swiftly rejected, deeming the idea "absurd" and stating the island was not for sale. However, since his potential return to office, Trump has reportedly redoubled his push, even refusing to rule out military force as an option to acquire the territory. The renewed threats have sparked a diplomatic crisis. Danish Prime Minister Mette Frederiksen has warned that a U.S. attack on Greenland would undermine NATO and post-World War II security. European leaders have also come to Greenland's defense, emphasizing that Arctic security must be achieved collectively, respecting sovereignty and international law. Within the U.S., there is bipartisan opposition to a forceful annexation of Greenland. U.S. lawmakers have met with Danish and Greenlandic officials to reassure them of congressional support and to lower tensions. Despite the widespread rejection, Trump maintains that the U.S. needs Greenland, claiming it would otherwise be vulnerable to Russian or Chinese occupation.