Confidential Affairs: Why U.S. policy shifted on Venezuela

For two decades the United States seemed powerless to alter the course of Venezuela’s socialist rule. But, in recent weeks the Trump administration has turned the screws on Nicolas Maduro, backing a constitutional challenge by opposition leaders. So, what changed? Former U.S. ambassador John Feeley looks back over the key moments; from a casual meeting at Trump Tower to a photo op at the White House.