(5.10.2017) During the early-afternoon press briefing on Capitol Hill, Senate Select Committee on Intelligence chair Richard Burr (R-North Carolina) and vice chair Mark Warner (D-Virginia) said the committee’s investigation had “hit a wall” in its efforts track down and verify claims made in a dossier compiled by a former British spy detailing alleged ties and collusion between President Donald Trump, his associates, and the Russian government, and the Kremlin’s efforts to “cultivate” him.