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Cory Booker, Kamala Harris, Pete Buttigieg and Elizabeth Warren. Photos: Scott Olson/Getty Images, Jim Watson/AFP/Getty Images, and Brendan Smialowski/AFP/Getty Images

The fourth round of Democratic debates will be held on Oct. 15 in Westerville, Ohio, with 12 candidates onstage, making it the biggest single-night debate to date. 

How it works: This debate had the same requirements as September's. Qualifying candidates must have reached 2% in 4 DNC-approved polls and drawn 130,000 unique donors — including 400 donors in 20 different states. Oct. 1 was the final day to make the cut.

Why it matters: The Democrats' massive 2020 field has put pressure on the DNC to focus its primary on those who can really challenge President Trump.

Which candidates will be on stage:
  1. Sen. Amy Klobuchar
  2. Sen. Cory Booker
  3. Mayor Pete Buttigieg
  4. Sen. Bernie Sanders
  5. Former Vice President Joe Biden
  6. Sen. Elizabeth Warren
  7. Sen. Kamala Harris
  8. Entrepreneur Andrew Yang
  9. Former Rep. Beto O'Rourke
  10. Former HUD Secretary Julián Castro
  11. Billionaire and activist Tom Steyer
  12. Rep. Tulsi Gabbard
Candidates that had at least 130,000 donors but did not meet the polling threshold:
  1. Author Marianne Williamson
Candidates who did not meet any qualifications for Ohio:
  1. Mayor Wayne Messam
  2. Former Rep. Joe Sestak
  3. Former Rep. John Delaney
  4. Rep. Tim Ryan
  5. Sen. Michael Bennet
  6. Gov. Steve Bullock

Go deeper:

Editor's note: This piece has been updated to reflect recent DNC requirement changes for the October debate.

Go deeper

Teachers across the U.S. protest laws restricting racism lessons

Thousands of teachers and other educators held protests across the U.S. Saturday against the actions of "at least 15 Republican-led states" that aim to restrict teaching about racism in class, the Washington Post reports.

Driving the news: There were demonstrations in at least 22 cities for the "Day of Action" to raise awareness about moves to limit students' exposure to critical race theory, which links racial discrimination to the nation's foundations and legal system, per Axios' Russell Contreras.

Updated 2 hours ago - Health

Lawsuit challenging Houston Methodist's COVID vaccine mandate dismissed

Houston Methodist Hospital in Houston, Texas. Photo: Brandon Bell/Getty Images

A federal judge on Saturday dismissed a lawsuit brought by 117 Houston Methodist staff over the hospital's policy requiring all employees to be vaccinated against COVID-19.

Why it matters: This is the first federal court ruling on a coronavirus vaccine mandate. Attorney Jared Woodfill, representing the plaintiffs, told KHOU 11 it's "the first battle in a long fight," as he vowed to file another lawsuit soon.

G7 leaders to announce plan to phase out gasoline cars

British Prime Minister Boris Johnson talks next to President Joe Biden and French President Emmanuel Macron at the G7 summit in Carbis Bay, Cornwall, England, on Saturday. Photo: Leon Neal/Getty Images

G7 leaders are set to outline Sunday a range of measures to tackle climate change, including "ending almost all direct government support" for fossil fuels and phasing out gasoline and diesel cars.

Driving the news: The plan was outlined in a British government announcement Saturday, which states that the leaders will also agree to halting "all unabated coal as soon as possible."