2020 debates: Biden-Harris rematch and progressive faceoff

Obama-Biden

Obama-Biden

Kamala Harris face off in the June 27 debate in Miami. That will make for odd optics on Night One and also potentially creates a hard position for Biden, given the exchange over school integration in the first debate.

But fairness can be. complicated.

Candidates were split into three groupings for the live drawing to determine the lineup to help ensure candidates with different levels of support were evenly split across both nights. Elizabeth Warren to appear together on July 30.

Blitzer later revealed the podium positions of the candidates, which will put the front-runner candidates close to the center on both nights.

The roster for the debate is nearly exactly the same as the first debate in Miami, though Montana Gov. Steve Bullock replaced U.S. Rep. Eric Swalwell, D-Calif., after he dropped out of the race. Amy Klobuchar, D-Minn., former Gov. John Hickenlooper, D-Colo., Gov. Steve Bullock, D-Mont., former Rep. John Delaney, D-Md., Rep. Tim Ryan, D-Ohio, and spiritual guru Marianne Williamson.

Sanders and Warren - who are reportedly longtime friends - will finally square off head-to-head in a battle for each other's supporters, as the two try to consolidate support from the progressive wing of the Democratic Party. The night will also feature the race's oldest candidate, Sanders, next to its youngest, Buttigieg.

On the second night, Biden and Harris will be joined by Booker, New York City Mayor Bill de Blasio, Senator Michael Bennet of Colorado, former Obama Cabinet member Julián Castro, Senator Kirsten Gillibrand of New York, Representative Tulsi Gabbard of Hawaii, Governor Jay Inslee of Wisconsin, and entrepreneur Andrew Yang.

Night 2 will be televised live on CNN, CNN International and CNN en Español at 5 p.m. Pacific on July 31 from Detroit.

On the first night, progressive favorites Vermont Sen.

The second night could reprise the clash between Harris and Biden that happened during the first debate, in which Harris, who is black, attacked Biden for opposing some busing to end school segregation in the 1970s.

If Warren - who said "I'm with Bernie" on health care the first time around - seeks to differentiate herself, she could argue that she's a better choice, plans and all, to make their shared proposals a reality. Another late entry to the race, billionaire activist Tom Steyer, did not meet the polling or fundraising thresholds required for the July debate. Candidates had to register at least 1% of support in three national polls or amass donations from 65,000 individuals to qualify.