President Trump tests the boundaries of his presidential power after ousting top officials at key agencies. Dr. Demetre Daskalakis, the former director of the CDC’s National Center for Immunization and Respiratory Diseases, joins Meet the Press NOW to discuss what prompted his decision to leave the health agency. The families of the two children killed in the Minneapolis church shooting speak out as the community continues to grapple with the tragic event. For more context and news coverage of the most important stories of our day, click here: nbcnews.com » Subscribe to NBC News: nbcnews.to/SubscribeToNBC » Watch more NBC video: bit.ly/MoreNBCNews » Subscribe to Here's the Scoop podcast: nbcnews.com/heres-the-scoop-daily-podcast NBC News Digital is a collection of innovative and powerful news brands that deliver compelling, diverse and engaging news stories. NBC News Digital features NBCNews.com, MSNBC.com, TODAY.com, Nightly News, Meet the Pres...