The best-selling author of a major new book on U.S. intelligence and accused spy Edward Snowden says President-elect Donald Trump is right to call for a major, top-to-bottom review of the intelligence community. Trump has received heavy criticism in recent weeks for calling into question the credibility of U.S. intelligence agencies in recent months, particularly over whether Russia was responsible for hacking embarrassing emails from the Democratic National Committee and Hillary Clinton’s campaign chairman, John Podesta.