In a letter to congressional leaders, FBI Director James Comey said details found in an “unrelated case” led to the discovery of "emails that appear to be pertinent to the Clinton investigation.”
Comey indicated that he had been briefed on the new material yesterday. "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," he wrote.
The FBI had previously closed its investigation in July with no charges, though Comey had concluded there had been classified content exchanged on the server and that Clinton had been "extremely careless."
Rest assured, this will dominate the next few days of campaign coverage. Clinton's campaign hasn't responded to the news yet. We'll update you with more when they do.
Donald Trump was campaigning New Hampshire Friday when he received the news. His reaction, via Politico:
He continued, "I have great respect for the fact that the FBI and the department of justice are now willing to have the courage to right the horrible mistake that they made."
Trump campaign manager Kellyanne Conway gave a first impression on Twitter:
Comey, in his letter, said the FBI does not yet know whether the new information is significant or how long it would take to complete the new investigation.
House Speaker Paul Ryan of Wisconsin appears to be first out with a response, saying Clinton "has nobody but herself to blame."