White House blocks Rob Porter from testifying about President Trump

The White House blocked the testimony of former senior adviser Rob Porter before the House Judiciary Committee on Tuesday, arguing that presidential aides are immune from subpoenas issued regarding their service in the administration.Porter, a former chief of staff to Sen. Orrin Hatch and top aide to Sen. Mike Lee, was subpoenaed to appear before the committee in a hearing titled “Presidential Obstruction of Justice and Abuse of Power,” part of a series of efforts the Democratic-led