Comey's decision less than two weeks before the presidential election has stunned former and current law enforcement officials and rocked the Clinton campaign, which appeared to be coasting to victory. The bureau director said in a memo to FBI employees he felt obligated to update lawmakers after testifying under oath that the investigation into Clinton's private email server was complete. And he feared that word of the newly discovered emails - found in the course of a separate investigation into former U.S. congressman Anthony Weiner, D-New York - would leak to the media and suggest a coverup, according to officials familiar with his thinking.