On Democratic debate night two here in Detroit, former Vice President Joe Biden will be center stage, looking to reassert himself as front-runner by rebutting the powerful case made last night by the party's leading liberals.

Plus, the tag team smackdown: Elizabeth Warren and Bernie Sanders teamed up to take on the moderates on night one -- deciding their rivalry for the progressive mantle can wait for another day.

And Marianne Williamson gets some of the night's biggest applause and shows just how different she is from the professional politicians on stage.

On Today's Panel: Matt Viser with The Washington Post, Lisa Lerer with The New York Times, POLITICO's Laura Barron-Lopez, and CNN's Jeff Zeleny via Knit