Secretary of State Marco Rubio says President Trump’s idea of purchasing Greenland is “not a joke”. Rubio said during an interview the idea has been talked about for years and is rooted in U.S. Security concerns, especially given China’s interest in the region. He told Sirius XM’s Megyn Kelly “This is not about acquiring land for the purpose of acquiring land. This is in our national interest, and it needs to be solved,” An optimistic President Trump has predicted Denmark will eventually—in his words-“come along” to the idea of selling the world’s largest island to the United States.