GOP Governor: 'World’s number one bully' Trump must resign

Former Republican Governor for New Jersey, Christine Todd Whitman, joins Ari Melber to discuss why she is calling for the resignation of President Trump. Whitman says she finds Trump and Giuliani’s argument that collusion is not a crime “extraordinarily offensive” and says the “erratic behavior” of Trump “has been building” as demonstrated by his handling of the NATO summit and his meeting with Russian President Vladimir Putin.