At the last Democratic debate, California Sen. Kamala Harris went after front-runner Vice President Joe Biden, putting him on the defensive. She subsequently scored points in the polls.
Now, the two will have a rematch in Detroit on July 31, the second night of CNN's Democratic presidential primary debate at the Fox Theatre, starting at 8 p.m. Biden will undoutedly be more prepared.
The candidates were randomly picked Thursday night by CNN to determine which day they appear.
Harris and Biden will be joined by New York Sen. Kirsten Gillibrand, Hawaii Rep. Tulsi Gabbard, Colorado Sen. Michael Bennet, New York Mayor Bill de Blasio, Washington Gov. Jay Inslee, New Jersey Sen. Cory Booker, businessman Andrew Yang and Julián Castro.
On the first night, the two stars -- Sens. Bernie Sanders and Elizabeth Warren -- will be joined by Maryland Rep. John Delaney, former Colorado Gov. John Hickenlooper, Ohio Rep. Tim Ryan, Montana Gov. Steve Bullock, author Marianne Williamson, Minnesota Sen. Amy Klobuchar, former Congressman Beto O'Rourke and Mayor Pete Buttigieg of South Bend, Ind.
It's "likely to be the last time many of the candidates will appear on a presidential debate stage in this election cycle," The New York Times notes. "And the first set of debates proved that drawing a successful contrast with an opponent can provide rocket fuel for a campaign."