Global warming is making both places more important to global shipping and trade. To imagine the kind of future a hotter, dryer climate may bring, and the geopolitical challenges it will create, look no farther than two parts of the world that Donald Trump wants America to control: Greenland and the Panama Canal.

But not everyone is sure that President-elect Donald Trump’s talk of annexing Canada and Greenland and reclaiming the Panama Canal is driven by a deeper strategy.

Former Trump national security advisor Robert O'Brien told FNC's "Sunday Morning Futures" why Donald Trump is talking about buying Greenland and seizing back control of the Panama Canal. About the Panama Canal: "We love the Panamanians.

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,

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.

President-elect Donald J. Trump promised that if elected he would govern in bold colors, not pale pastels. Our next president

Trump again having designs on Greenland comes after the president-elect suggested over the weekend that the U.S. could retake control of the Panama Canal if something isn't done to ease rising shipping costs required for using the waterway linking the Atlantic and Pacific oceans.

National Review staff writer Caroline Downey and former White House official Meghan Hays join 'Mediabuzz' to discuss President-elect Trump insisting on buying Greenland and threatening to seize control of the Panama Canal.