The eldest son of President-elect Donald Trump visited Greenland after his father refused to rule out military force to take control of the Arctic island.

President-elect Donald Trump told residents of Greenland that “we’re going to treat you well” as his oldest son visited the mineral-rich Danish territory that’s home to a large U.S. military base, heightening speculation that the incoming U.S. administration could seek to acquire it.

Donald Trump, Jr., son of President-elect Donald Trump, emphasized that his visit to Greenland on Tuesday was just a personal one.