MSNBC Panelist: Modern Conservatism is 'White Nationalism, Red in Tooth and Claw"

On Thursday’s edition of All In, Chris Hayes brought on “perhaps America’s leading historian on the modern conservative movement” Rick Perlstein to discuss the attacks against Donald Trump for not being a proper conservative. Perlstein argued that when GOP candidates fight over the conservative mantel they really are saying, “I'm the guy that’s going to protect white virtue from, you know, the dark scary hoards.”