Politics with Amy Walter: Mueller's Testimony Underscores a Crisis of Faith in Democracy Listen Download Embed Share Share this on Facebook (Opens in a new window) Share this on Twitter (Opens in a new window) Share this via Email Former special counsel Robert Mueller is sworn in to testify to the House Judiciary Committee about his investigation into Russian interference in the 2016 election. ( AP Photo/J. Scott Applewhite ) Produced by GBH, PRX and WNYC Studios