MIAMI — Massachusetts Sen. Elizabeth Warren raised her hand as one of the only Democratic presidential contenders willing to abolish her own private health insurance in favor of a government-run plan, demanding “structural change” in the economy and the government as Democrats met on the debate stage for the first time in the 2020 presidential season.

Warren’s position highlighted a rift within her party’s most ambitious contenders over how to approach inequality in America in a prime-time meeting Wednesday night that marked the unofficial starting line for the Democratic Party’s quest to wrest the White House from Donald Trump and deny him a second term.

Most of Warren’s rivals, including former Texas Rep. Beto O’Rourke, called for universal health care, but also favored preserving the private insurance market.

Vermont Sen. Bernie Sanders, who will be in a second debate group Thursday night, has proposed a “Medicare for All” system without private insurance, and Warren said she agreed with him.

No one on stage attacked Warren by name in the early minutes of a largely civil prime-time clash in which most of the candidates leaned into their party’s focus on class warfare.

“I think of it this way. Who is this economy really working for? It’s doing great for a thinner and thinner slice at the top,” Warren declared. “That is corruption pure and simple, and we need to make structural change.”

One of the few voices for the moderate wing of the Democratic Party on stage, former Maryland Rep. John Delaney, pushed back: “We should be the party that keeps what’s working and fixes what’s broken,” he said. “Why do we have to stand for taking away something from people.”

New York Mayor Bill de Blasio, who joined Warren in raising his hand, cast the debate as one for “the battle for the heart and soul of our party.”

While the crowded field has been courting voters in key states for several months already, the vast majority of the nation has yet to pay close attention to the diverse field.

That began to change Wednesday night as a collection of 10 candidates, led by Warren, faced each other on national television for two hours. The overall field is so large that a second group of 10 Democrats, led by early front-runner Joe Biden, will debate 24 hours later.

The groupings were chosen at random by debate host NBC.

Democrats are unified in their deep desire to beat Trump but divided on what kind of candidate is best positioned to do so.

On one side: candidates like Warren who are demanding dramatic change that includes embracing liberal policy priorities like free universal health care, debt-free college, a forgiving immigration policy and higher taxes on the rich. On the other: pragmatic-minded Democrats like Biden — and little-known former Maryland Rep. Delaney — who are calling for modest policy solutions that could ultimately attract bipartisan support.

Beyond Warren, O’Rourke, de Blasio and Delaney, Wednesday’s debate featured Sens. Cory Booker of New Jersey and Amy Klobuchar of Minnesota, Reps. Tulsi Gabbard of Hawaii and Tim Ryan of Ohio, along with Washington Gov. Jay Inslee and ex-Obama Housing Secretary Julian Castro.

Earlier in the debate, O’Rourke showed off his fluent Spanish while answering his first debate question.

O’Rourke said in English that “this economy has got to work for everyone” and that, right now, it isn’t. Then he switched to Spanish, saying in that language that “we need to include everyone” in a booming national economy.

O’Rourke, who hails from the Texas-Mexico border city of El Paso, spoke in Spanish at length, then switched back to English. He said the Trump administration has focused on helping the wealthy and large corporations over everyday Americans — echoing similar sentiments of the other Democrats on stage.

Later, the candidates decried the Trump administration’s tough immigration policies, saying the president is to blame for the deaths of an immigrant father and his toddler daughter found lying facedown after drowning in the Rio Grande.

Castro said a photo of the family “is heartbreaking” and “should piss us all off.”

He also attacked O’Rourke for not supporting fully decriminalizing the act of crossing the U.S.-Mexico border illegally.

Booker spoke briefly in Spanish to further chastise Trump’s policies, and O’Rourke took a question in Spanish and answered it, saying, “We are going to treat everyone with respect.”

De Blasio said the economy hasn’t been hurt by immigrants. He says corporations are to blame.

The first hour of the debate passed with hardly a mention of the man whom the candidates hope to face next November.

It was 16 minutes into the debate before President Trump’s name was uttered by Klobuchar, who briefly referenced him again as the debate headed into its second hour.

Responding to a question about U.S. tensions with Iran, Klobuchar said, “I don’t think we should conduct foreign policy in our bathrobe at 5 in the morning.”

Trump, the elephant not in the room, was in the air traveling to Japan for a round of trade talks as Democrats faced the nation for the first time in the 2020 campaign.

Earlier in the day, he confirmed that he would watch the debate from Air Force One.

His first tweet of the night: “BORING!”