(CNN) The second debate of the 2020 Democratic presidential primary, hosted by CNN, will take place in Detroit on July 30 and 31, the Democratic National Committee announced Tuesday.

The debate will bring the crowded field of Democratic candidates to the battleground state of Michigan, which President Donald Trump won in 2016.

The debate will feature randomized lineups drawn from a maximum of 20 qualifying candidates. A total of 12 presidential primary debates are planned during the 2020 cycle. The first debate, hosted by NBC News, will be June 26-27 in Miami.

The 2020 Democratic field is already large and diverse, with more than a dozen contenders in the race and other high-profile candidates, including former Vice President Joe Biden and Georgia Democrat Stacey Abrams, still considering a run.

Qualifying for the debates is based on a two-path system, determined by polling and grass-roots fundraising. The selection methodology will use the two measures in combination if more than 20 candidates qualify and the field needs to be narrowed down.

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