Anderson Cooper 360

High Stakes For CNN Debate; Will Moderate Candidates Take On Warren, Sanders?; One-On-One With Senator Bernie Sander's Campaign Manager; Elizabeth Warren Arrives At Debate Hall; Warren, Sanders Go Head-To-Head Tonight; DNC Chairman Previews Tonight's Debate; Warren, Sanders Share Stage With Moderates; DNC Chairman On The Party's 2020 Strategy; Democrats Vs. Pres. Trump; How Hard Should Dems Go After Pres. Trump Tonight?; Break-Out Moments Critical Tonight; The Art Of Interrupting; Soon: Candidates Take State For First Round Of CNN Debates via Knit