The GOP nominee is rallying his base and taking on the GOP establishment including House Speaker Paul Ryan. How ugly could things get? MSNBC's Brian Williams talks to Hallie Jackson, Robert Costa, and Mark Halperin.

Delivering on his promise of a 'scorched-earth campaign,' Donald Trump is accusing the Clintons, Democrats, and the media of orchestrating a smear against him. MSNBC's Brian Williams and NBC News' Katy Tur have details.