How the White House explanation of Comey firing has changed

As President Trump lambasted in an interview the man he had fired two days ago, the acting FBI director at a Senate hearing painted a very different picture of James Comey. Meanwhile, the president's explanation seemed to contradict what White House officials have been saying. William Brangham recaps the conflicting statements and Judy Woodruff gets an update from Lisa Desjardins and John Yang.