Alex Wagner breaks down the origins of Trump's interest in taking over Greenland and the Panama Canal and why its serious, however ridiculous the idea may be.

Greenland’s future could be the kind of Compact of Free Association that America has with three Pacific Island states, Trump aides are telling reporters. Under these Compacts, the island nations get sovereignty, development assistance, and the right of residents to live and work in America. In return, Washington takes over defense.