Bernie Sanders, Joe Biden Together at Night 2: NPR

The queues are set for the first presidential primary Democratic debates.

Among the debates: Former Vice President Joe Biden, currently National Primary Election Leader, will face the Vermont Senator and 2016 nominee, Bernie Sanders, as well as Senators Kamala Harris and South Bend, Ind., The Mayor Pete Buttigieg.

Meanwhile, Massachusetts Senator Elizabeth Warren will face New Jersey Senator Cory Booker and Minnesota Senator Amy Klobuchar.

Due to the large number of candidates, the DNC organized two two-hour debates on June 26th and 27th. He also made sure that the candidates with the greatest number of polls were evenly distributed during the two evenings, in order to avoid a situation of debate "at the children's table". The Republican Party was confronted with these criticisms during its primary debates in 2016, when it placed the candidates with the least votes in a debate separate from those of the candidates with the most votes.

Candidates for the debate of June 26: New York City Mayor Bill de Blasio, New Jersey Senator Cory Booker, former HUD Secretary Julián Castro, former Maryland Representative John Delaney, representative of Hawaii Tulsi Gabbard, Washington Governor, Jay Inslee, Minnesota Senator, Amy Klobuchar, the former Texas representative. Beto O 'Rourke, Ohio Representative, Tim Ryan, and Massachusetts Senator Elizabeth Warren.

Candidates for the debate of June 27: Colorado Senator Michael Bennet; former Vice President Joe Biden; South Bend, Indiana, Mayor Pete Buttigieg; New York Senator Kirsten Gillibrand; Senator of California, Kamala Harris; former Colorado governor John Hickenlooper; Vermont Senator Bernie Sanders; California Representative Eric Swalwell; writer and spiritual guru Marianne Williamson and entrepreneur Andrew Yang.

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To qualify for the debates, the candidates were expected to bring together 65,000 donors in 20 states, or obtain support of at least 1 percent in three national or anticipated polls.

Of the top 23 Democratic candidates, three failed to qualify: Montana Governor Steve Bullock; Miramar, Florida, Mayor Wayne Messam; and Massachusetts Rep. Seth Moulton. Bullock sent Thursday a letter to the DNC in which he claimed to be qualified, but the DNC has not changed its lineup.

The alignments were defined by manual drawing at NBC News headquarters in New York with a representative from each campaign present, the network said. After the group draw, NBC decided who would attend which night. Their placement on stage will be decided later, depending on the vote.

The debates will be broadcast on NBC, MSNBC and Telemundo at 9 pm AND on both nights.