Biden and Harris set for rematch hours from now; Campaign: Biden prepared for "Flat-out lies and distortions"; Campaign: Biden's "Primary Goal" is to take on Trump; CNN debates last chance for some democrats to break through; Debates highlight split between progressives and moderates; Democrats divided on how to address economy, health care, climate; Guest entering now; Awaiting arrival of candidates; Booker, Biden likely to spar over policing, criminal justice; via Knit