With China Defiant on Iranian Oil, Trump's Sanctions Strategy is Tested

The United States announced earlier this week that it is stopping exemptions given to five countries that continue to buy Iranian oil, saying they must stop purchases by May 1 or face sanctions. China, the top buyer of Iranian oil, and Iran's neighbor Turkey, are resolutely opposing the move, putting the Trump administration's approach of using sanctions to force foreign policy changes to the test. White House Correspondent Patsy Widakuswara has this story.