NEW - White House activates cyber emergency response under Presidential Policy Directive (PPD) 41, the FBI, CISA, and ODNI have formed a Cyber Unified Coordination Group (UCG) to "coordinate a whole-of-government response to this significant cyber incident."
JUST IN - U.S. Senate Armed Services Committee has received information on the significant, sophisticated, and ongoing cybersecurity intrusion against the United States (via @rabrowne75 ).