Lawrence: House Republican says we're not 'little b----es.’ Dem calls out GOP's Trump bill mistake.

Tonight on The Last Word: House Republicans scramble to advance Donald Trump’s budget bill. And researchers say USAID cuts could lead to 14 million deaths over the next five years. Rep. Brendan Boyle, Norm Ornstein, Rep. Jamie Raskin, and Dr. Atul Gawande join Lawrence O’Donnell.