Barr defends his handling of Mueller report, despite criticism from special counsel

Summary: Attorney General William Barr testified before the Senate Judiciary Committee Wednesday to explain his handling of the Mueller report. While Barr defended his actions, Democrats zeroed in on a newly discovered letter from Mueller criticizing Barr's summary of the report's “principal conclusions.” Meanwhile, Barr said he would not attend a planned House hearing Thursday. Judy Woodruff reports.