 President Biden and Vice President Harris received an updated briefing in the White House Situation Room Sunday. Included in the briefing were Attorney General Merrick Garland, Homeland Security Secretary Alejandro Mayorkas, FBI Director Christopher Wray, the Director of the Secret Service, and the President's National Security and Homeland Security Advisors. President Biden set to deliver remarks from the White House this afternoon. Karen Travers, ABC News, Washington.