"This is in our national interest and it needs to be solved," Rubio said. Greenland's prime minister has repeatedly said the island is not for sale.

As President Trump pushes for Greenland to join the U.S., a new poll finds 85% of the semi-autonomous Danish territory's residents oppose the move. Why it matters: Trump has stepped up his push push for Greenland since he won November's election despite the terrotory's leader and Denmark's prime minister saying it's not for sale and told reporters Saturday he thinks the U.