>> we're following breaking news. a stunning window into mueller's investigation of paul manafort and possible collusion with russia. in a new court filing, manafort's lawyers inadvertently reveal that their client shared sensitive polling data with an allege ed kremlin operative durg the 2016 campaign. this as we're awaiting the presidential oval office speech on border security. we're told he is not likely to declare a national emergency tonight to secure funds for his wall, but that could still happen. we also know mr. trump will make the case that a crisis is unfolding, a crisis democrats say he has manufactured to try to force their hands in the midst of the government shutdown. this hour, i will talk with denny heck, a democrat who serves on the intelligence committee, and our correspondents and analysts are standing by. first, let's go to sara murray. there are multiple developments in the russia investigation,