The FBI is reopening the investigation into Hillary Clinton's private email server that she used while serving as secretary of state, NBC News has learned. FBI Director James Comey wrote in a letter to Congress that "in connection with an unrelated case, the FBI has learned of the existence of emails that appear to be pertinent to the investigation … I agreed that the FBI should take appropriate investigative steps designed to allow investigators to review these emails to determine whether they contain classified information, as well as to assess their importance to our investigation."
Analysts at NBC pointed out that there would have to be "pretty dramatic information in these emails to change the previous conclusion."
"Could be a big deal. Or nothing," Mother Jones' Washington bureau chief David Corn observed.
In July, the FBI recommended no criminal charges for Clinton, but Comey did call her handling of classified information in emails "extremely careless" during his congressional testimony.