Acting White House chief of staff Mick Mulvaney has been subpoenaed to appear Friday morning before the House Intelligence Committee as part of the impeachment inquiry into President Donald Trump, an official working on the inquiry told CNN. "Mr. Mulvaney has the opportunity to uphold his oath to the nation and Constitution by testifying tomorrow under oath about matters of keen national importance," the official told CNN. "We hope Mr. Mulvaney does not hide behind the President's ongoing efforts to conceal the truth and obstruct our investigation." The subpoena comes following House investigators' request on ... (full story)