Only on the "CBS This Morning" podcast, CBS News political correspondent Ed O'Keefe joins CBSN's "Red and Blue" host Elaine Quijano from Detroit, the site of the second Democratic presidential debate, to discuss what we can expect. From Senator Bernie Sanders and Senator Elizabeth Warren sharing the stage for the first time to round two of former Vice President Joe Biden and Senator Kamala Harris. With Biden and Harris on the stage, will former HUD Secretary Julian Castro and Senator Cory Booker be able to break through? Plus, Ed shares what we can expect from the new comer - Montana Governor Steve Bullock, who is the only candidate in the race who's won a statewide election in a state won by President Trump in 2016.