Democrats set for second round of presidential debates

July 30 (UPI) -- Twenty Democratic presidential hopefuls are preparing for the second round of primary debates starting Tuesday night in Detroit.

Like the first round in Miami last month, the candidates have been split into two groups at random. The first group of 10 candidates will take the stage at Detroit's Fox Theatre for the two-hour event at 8 p.m. EDT. The second group will debate Wednesday. They will be hosted and broadcast by CNN.

The lineups

Tuesday night's lineup will include Sen. Bernie Sanders, Sen. Elizabeth Warren, former U.S. Rep. Beto O'Rourke, Sen. Amy Klobuchar, South Bend, Ind., Mayor Pete Buttgieg, former Colorado Gov. John Hickenlooper, former U.S. Rep. John Delaney, U.S. Rep. Tim Ryan, Montana Gov. Steve Bullock and author Marianne Williamson.

To qualify, candidates were required to hold at least 1 percent support in at least three approved polls or receive 65,000 unique campaign donations.

CNN's Don Lemon, Dana Bash and Jake Tapper will moderate.

Wednesday night's lineup features former Vice President Joe Biden, Sen. Kamala Harris, Washington Gov. Jay Inslee, Sen. Kirsten Gillibrand, U.S. Rep. Tulsi Gabbard, Sen. Michael Bennet, New York Mayor Bill de Blasio, Sen. Cory Booker, entrepreneur Andrew Yang and former Housing and Urban Development Secretary Julian Castro.

Candidates who did not qualify for the second debates are former Rep. Joe Sestak, billionaire Tom Steyer, former Alaska Sen. Mike Gravel, Massachusetts Rep. Seth Moulton and Miramar, Fla., Mayor Wayne Messam. California Rep. Eric Swalwell dropped out of the race after the first debates.

Since last time

Several candidates have unveiled more of their policy plans since the first debates.

This week, Warren released her vision on trade reform, which is designed to give the American public more of a say in trade negotiations. Hickenlooper unveiled his plan to revitalize rural America by expanding broadband Internet. Inslee detailed his plan to fight climate change, which targets what he calls the vulnerable "front lines," and Harris released her version of Medicare for all. Delaney proposed mandatory "national service" for all Americans upon graduation from high school in exchange for free college tuition.

Harris has also floated a plan to invest in science, technology, mathematics and engineering education at historically black colleges and a $100 billion plan to aid minority home ownership. Buttgieg revealed an economic plan to support unions and temporary workers.

Gillibrand unveiled a $10 trillion climate change plan. Biden proposed criminal justice reform and a plan to build on the Affordable Care Act, rather than start healthcare reform from scratch. Warren also released a plan for Wall Street reform and Inslee proposed linking a climate change plan to education. Booker outlined an immigration plan that would eliminate migrant detentions and for-profit prisons.