The Latest: 1st Democratic debate of 2020 election begins

MIAMI (AP) — The Latest on the Democratic presidential debates (all times local):

9 p.m.

The first debate of the 2020 Democratic presidential race is kicking off with a two-hour event featuring 10 candidates, including three senators, a mayor and several current or former members of Congress.

Sen. Elizabeth Warren of Massachusetts is center stage for Wednesday's debate in Miami because she leads the night's field in polling. She is flanked by former Rep. Beto O'Rourke of Texas and Sen. Cory Booker of New Jersey. At the far ends are New York City Mayor Bill de Blasio and former Rep. John Delaney of Maryland, who are polling at the bottom of the group.

The candidates will get right to it. NBC says they will be allowed to give closing statements but no openings.

Ten other candidates will meet Thursday for the second debate night.

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8:55 p.m.

The chairman of the Democratic National Committee is firing up the crowd at his party's first presidential primary debate — and previewing some lines of attack that candidates will use against President Donald Trump.

Tom Perez said Wednesday that the planet is under threat from unchecked climate change and that justice itself has been threatened under the current administration.

He says the Trump White House is nothing but a long trail of "broken promises" and corruption. There was long applause when Perez said immigrant children shouldn't be separated from their parents at the U.S.-Mexico border.

Ten Democrats hoping to deny Trump a second term will kick off two nights of back-to-back debates shortly. They entered the stage and waved to the audience before the debate began.

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8:40 p.m.

John Hickenlooper's struggle to get noticed in the crowded presidential primary field was on full display when a staffer at the first Democratic debate mistook him for a member of the press.

The former Colorado governor was entering the Miami debate hall Wednesday when a security guard asked if he was there to pick up his media credentials.

A reporter for National Public Radio who witnessed the exchange tweeted that Hickenlooper responded: "I'm a candidate."

But Hickenlooper may have gotten the last laugh with a jab at President Donald Trump, who was a reality TV star before he entered politics.

Hickenlooper quipped on Twitter: "Last time, we elected the most famous candidate. Let's try something new."

Hickenlooper will join nine other candidates Thursday night for the second of two debates.

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12:30 p.m.

White House hopefuls in Miami for the Democratic debates are trekking to nearby Homestead, Florida, to visit a large migrant detention facility.

The stops are intended to draw attention to President Donald Trump's immigration policies, which have seen migrant children separated from their families. Homestead is about 40 miles southwest of Miami and is a spot where the U.S. is detaining migrant teens.

Massachusetts Sen. Elizabeth Warren visited the site Wednesday, with Minnesota Sen. Amy Klobuchar planning a stop later in the afternoon.

Former Texas Rep. Beto O'Rourke is scheduled to visit the site on Thursday.

And on Friday, California Sen. Kamala Harris, former housing secretary Julian Castro, former U.S. Rep. John Delaney and Pete Buttigieg (BOO'-tuh-juhj), the mayor of South Bend, Indiana, all plan to visit.

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12:20 a.m.

Ten presidential candidates, led by Sen. Elizabeth Warren, are set to meet on the debate stage for the first night of Democratic debates to offer their pitches to voters and attempt a breakout moment for their campaigns.

For many of the White House hopefuls, Wednesday's debate will be the highest-profile opportunity yet to offer their vision for the country.

Given the massive field, the debate will be split over two nights, with 10 other candidates — including former Vice President Joe Biden and Vermont Sen. Bernie Sanders — appearing Thursday.

Warren, the sole top-tier candidate at Wednesday's debate, will take center stage. But she could still face challenges. The other candidates aren't as well known and could use the moment to make an aggressive move to stand out.