Trump's former White House national security advisor made veiled threats against a NATO ally, taking the Greenland issue in a bizarre direction.

Former national security adviser Robert O’Brien said in a Sunday interview that Denmark should let the U.S. “buy” Greenland if it cannot defend the self-governing country, noting the territory

Corey Lewandowski, a senior adviser to Donald Trump, defended the president-elect's desire to take over Greenland by arguing his boss was a "real estate master." During a Monday interview on Newsmax,

At first, he joked about Canada being an additional US state. Since, he has threatened to take back control of the Panama Canal. He also reiterated a desire from his first term to own the autonomous Danish territory of Greenland, which is not for sale.

President-elect Donald Trump shared his renewed interest Sunday in the U.S. controlling the autonomous territory of Greenland, which is owned by Denmark.

In recent days the president-elect has called for asserting U.S. control over the Panama Canal and Greenland, showing that his “America First” philosophy has an expansionist dimension.

Former Trump national security advisor Robert O'Brien explained on FNC's "Sunday Morning Futures" why Donald Trump wants to buy Greenland and control the Panama Canal. Both Trump targets have given strong pushback regarding any potential takeovers,

Denmark needs to do more than add dog sleds to defend Greenland, given its icy territory has it “on the front lines of the war against Russia and China,” ex-National Security Adviser Robert O’Brien said Sunday.