NBCNews Exclusive: Ex-Ukraine prosecutor named by whistleblower speaks out

NBC News has an exclusive interview with a key player at the center of the story that's gripped Washington – Ukrainian former prosecutor Yuri Lutsenko. MSNBC’s Richard Engel joins Andrea Mitchell with more on his interview. Also joining with his insight is former U.S. Ambassador to Russia, Michael McFaul.Sept. 27, 2019