There are two paths to qualifying for the debate stage: breaking 1 percent in three polls from pollsters approved by the Democratic National Committee, or tallying 65,000 unique campaign donors, with at least 200 donors in 20 different states.

Who is responsible for creating the criteria?

The Democratic National Committee, which is sanctioning each of the debates. In 2016, when there was a large field of Republicans, the criteria were set by the sponsoring media organizations and varied from debate to debate.

According to the Federal Election Commission, there are over 170 declared Democratic presidential candidates . How many can qualify for the first debate?

Twenty. That’s a lot more than the party’s 2016 primary debates, which never featured more than five.

So there could be 20 candidates on the stage at once? That seems like a lot.

That would be a lot. Instead, the DNC will break the field into two debates of no more than 10 people on consecutive nights. Candidates who are polling at or above 2 percent will be split into one group, while candidates polling below that mark will be in a second group. Both groups will then be evenly divided among the two nights. That means that the top two candidates in the polls — currently Joe Biden and Bernie Sanders — might not actually debate each other in Miami.

Who has qualified so far?

The DNC has not announced which candidates have officially qualified, but POLITICO counts 20 who have met the party’s criteria: Michael Bennet, Biden, Cory Booker, Pete Buttigieg, Julián Castro, Bill de Blasio, John Delaney, Tulsi Gabbard, Kirsten Gillibrand, Kamala Harris, John Hickenlooper, Jay Inslee, Amy Klobuchar, Beto O’Rourke, Tim Ryan, Sanders, Eric Swalwell, Elizabeth Warren, Marianne Williamson and Andrew Yang.

Six candidates — Bennet, de Blasio, Hickenlooper, Delaney, Ryan and Swalwell — who have hit the polling threshold have not publicly said they’ve reached the donor mark.

What if more than 20 candidates meet at least one of the qualifying criteria?

Then some will be left off the debate stages. To decide who makes it, the DNC will use a series of tiebreakers, with the first one prioritizing candidates who have surpassed both thresholds.

If fewer than 20 candidates meet both the polling and donor thresholds, candidates who have met just the polling threshold will fill the remaining spots, starting with those who have the highest polling average. If there are still any spots remaining, candidates who met just the grassroots fundraising threshold will get on stage, ranked according to who has the highest number of unique donors.

POLITICO has obtained the rules the DNC will use to calculate polling averages. The DNC will take the top three polling results for each candidate and divide by three, rounding to the nearest tenth of a percentage point. If there’s a tie in the polling average between candidates (and it would lead to more than 20 candidates being on stage), “candidates who are initially tied for the final qualifying spots will be ranked according to the total number of qualifying polls” in which the candidate broke 1 percent support, according to the rules.

POLITICO is calculating the polling average for the candidates. So far, no candidate who has crossed either threshold will be left off the stage.

Who is in danger of getting left out?

It is very possible that candidates, including current or former statewide elected officials, will be excluded from the stage. In addition to those who have met at least one of the criteria, there are several declared candidates who have not yet cleared either threshold: Montana Gov. Steve Bullock, Rep. Seth Moulton and Miramar, Fla., Mayor Wayne Messam.

And there’s still some would-be “serious” candidates who aren’t even in the race yet, but could theoretically qualify — like Georgia Democrat Stacey Abrams.

If more than 20 candidates meet the criteria, those in the most immediate danger of still missing out via tiebreaker are the ones who have hit only the donor threshold. Currently, no candidate has hit the donation threshold without also hitting the polling threshold. (Former Sen. Mike Gravel, whose campaign run by a group of teenage activists, is trying to make the debate stage by clearing the donor threshold.)

After that, look to the candidates who are polling incredibly low, but who have hit the poll threshold. Candidates like Bennet, de Blasio or Swalwell — candidates who have hit 1 percent in a few polls but have also posted goose eggs in others — could be at risk.

When will the field be finalized?

The DNC will announce the field about two weeks before the debate, after verifying information from the campaigns. Candidates can qualify for the first debates at the end of June through June 12. After the field of candidates is confirmed, random lots will be drawn to determine on which night each candidate will appear.

The committee hasn’t disclosed how it plans to announce the two debate fields, but the random drawing is expected to be held on June 14.

What about the debates after that?

The second series of debates in late July in Detroit will also have the same qualifying rules. However, the third and fourth rounds of debate, which will be held in the fall, will have a higher bar for qualification: Candidates need to get 2 percent in four approved polls, and need to receive 130,000 donors (with 400 donors in 20 states). This has led some candidates who have not broken out from the pack to complain that the new qualifications could fundamentally change how they campaign.

“In all of the prior primaries, we saw the thresholds evolve as the campaigns evolved, and this will be no different,” DNC Chairman Tom Perez said in a March C-SPAN interview. “As we get closer and closer to the first caucus in Iowa, I think it is important for candidates to show they have made progress.”