House Judiciary Committee ranking member Republican Doug Collins speaks during the House Judiciary Committee hearing entitled, 'Presidential Obstruction of Justice and Abuse of Power', with testimony from Former Trump campaign manager Corey Lewandowski (not pictured), on Capitol Hill in Washington, DC, USA, 17 September 2019. Former White House Staff Secretary Rob Porter and former White House Deputy Chief of Staff Rick Dearborn, who were both subpoenaed to appear beside Corey Lewandowski, did not show up. The White House has claimed Lewandowski is protected by executive privelege and has been directed not to answer questions regarding conversations on government matters with President Trump or senior administration officials. The committee is seeking information on possible obstruction of justice that former special counsel Robert Mueller detailed in his report.