FILE - US Attorney General Bill Barr speaks during a roundtable meeting on seniors with US President Donald Trump in the Cabinet Room at the White House. (SAUL LOEB/AFP via Getty Images)Attorney General William Barr said Wednesday he will testify before the House Judiciary Committee next month for the first time as the panel examines whether he has inappropriately politicized the Justice Department.One of Barr's federal prosecutors is testifying to the committee Wednesday that Roger Stone, a close ally of President Donald Trump, was given special treatment ahead of his sentencing because of his relationship with the president.