Donald Trump’s imperialist designs on Greenland, Canada and Panama often sound like the ramblings of a chaos agent who views geopolitics and global trade like a real estate shark chasing new leads.

President-elect Trump refused to rule out military action to pursue his unprecedented vow to take Greenland and the Panama Canal -- plus absorb Canada. Why has he set his sights on expanding beyond the United States' borders?

Surveys show most Canadians prefer staying separate, though some see potential power in a merger. What would it look like if Canada joined the U.S.?

Canada Prime Minister Justin Trudeau responded to Trump’s pitch of merging with its northern neighbor on CNN’s “The Lead with Jake Tapper.” Trump has repeatedly trolled Trudeau in recent weeks and keeps pushing the idea of making Canada the 51st state of the U.