President Donald Trump's interest in buying Greenland is "not a joke," Secretary of State Marco Rubio said in an interview on Thursday, adding that acquiring Greenland was in U.S. national interest and needs to be solved.

Secretary of State Marco Rubio called President Trump's desire to buy Greenland in the "the national interest" of the U.S. during an interview Thursday. The big picture: Trump has doubled down on his push for Greenland since winning the presidential election,

In 2019, then-President Donald Trump suggested the United States “buy Greenland” — as a matter of national security. Now in office again, Trump has continued to push for acquisition of the island, illustrated by a recent “horrendous” call with Denmark’s prime minister just last week on the matter.