Trump's comments renew anxieties over plans for Greenland and Cuba

A day after the audacious U.S. military operation in Venezuela, President Donald Trump on Sunday renewed his calls for an American takeover of the Danish territory of Greenland for the sake of U.S. security interests, while his top diplomat declared the communist government in Cuba is "in a lot of trouble."

The comments from Trump and Secretary of State Marco Rubio after the ouster of Venezuela's Nicolás Maduro underscore that the U.S. administration is serious about taking a more expansive role in the Western Hemisphere.

With thinly veiled threats, Trump is rattling hemispheric friends and foes alike, spurring a pointed question around the globe: Who's next?