Warren attacks the Bern and Dem SuperPAC goes negative against Trump but will it work?

A day after it's leaked that Bernie's campaign had a volunteer phone script contrasting Warren, Bernie goes on the defense over a 2018 meeting in which he allegedly told Warren a woman couldn't win. Bernie claims it's all a lie. Who planted to story? John will explain.   Plus, John takes a victory lap over predicting Cory Booker dropping out of the race.   Major Dem SuperPAC is preparing to spend over $150 million to attack Trump before the Convention but will it work?