WASHINGTON (AP) — Bernie Sanders’ commanding Nevada caucus victory made him a top target for his Democratic rivals and a growing source of anxiety for establishment Democrats worried that the nomination of a self-avowed democratic socialist could cost the party the White House.

Sanders' win solidified his front-runner status in the crowded field as the race turns to Saturday's presidential primary in South Carolina, where his moderate opponents will scramble to try to blunt the Vermont senator's momentum. Just three days later after that contest, 14 states vote on Super Tuesday, March 3, when one-third of the delegates are awarded. A strong showing in those states could put Sanders on a glide path to the nomination against Republican President Donald Trump.

That prospect has amplified concerns for Democrats who believe Sanders' liberal policies will drive away moderate and independent voters in the general election in November. South Carolina Rep. Jim Clyburn, the top-ranking black leader in Congress, warned of added risk for Democrats if Sanders was the nominee.

“I think it would be a real burden for us in these states or congressional districts that we have to do well in," Clyburn told “This Week” on ABC.

He noted that congressional districts that helped Democrats win back the House are moderate and conservative. "In those districts, it's going to be tough to hold on to these jobs if you have to make the case for accepting a self-proclaimed democratic socialist,” Clyburn said.

Sanders' campaign argue the candidate will bring in new voters — largely progressives, young people and voters of color — who have been alienated by politics.

He successfully relied on that coalition Saturday to dominate his Democratic rivals in Nevada, pulling far ahead of second-place finisher former Vice President Joe Biden and Pete Buttigieg, the former mayor of South Bend, Indiana, who came in third. Massachusetts Sen. Elizabeth Warren landed in fourth, while Minnesota Sen. Amy Klobuchar and Tom Steyer were still in a close race for fifth on Sunday.

“We are bringing our people together," Sanders said Saturday night. “In Nevada we have just brought together a multigenerational, multiracial coalition which is not only going to win in Nevada, it’s going to sweep this country.”

Sanders' new status was clear as both Buttigieg and Biden went after him harder than they have before.

In his speech to supporters in Las Vegas, Buttigieg denounced Sanders in his sharpest terms yet, changing that the senator was calling for an “inflexible, ideological revolution that leaves out most Democrats.”

"Not to mention most Americans,” Buttigieg said.

He said Sanders has shown a “willingness to ignore or dismiss, or even attack the very Democrats that we absolutely must send to Capitol Hill."

Biden, whose struggling campaign got only a slight boost in Nevada, took an indirect swipe both billionaire candidate Mike Bloomberg and Sanders, who is an independent and not a member of the party he's seeking to represent in November.

“I ain’t a socialist. I’m not a plutocrat. I’m a Democrat," Biden told supporters.

But some Democrats are worried that the new focus on Sanders may be too little, too late. Democratic strategist James Carville bemoaned the fact that until recently, most of Sanders' opponents have largely failed to attack Sanders or draw scrutiny to his record.

“We gotta hope that some of these candidates develop political skills quickly,” he said.

If Sanders is the nominee, Carville said, “the risk in losing the election is deep and profound.” He added: “We just gotta pray.”

Indeed, Trump gloated on social media, continuing his weekslong push to sow discord between Sanders and his Democratic rivals.

“Looks like Crazy Bernie is doing well in the Great State of Nevada. Biden & the rest look weak,” Trump tweeted. “Congratulations Bernie, & don’t let them take it away from you!”

All the Democratic candidates are pledging to stay in the race through South Carolina, and some candidates were already campaigning Sunday in Super Tuesday states.

Nevada's caucuses were the first chance for White House hopefuls to demonstrate appeal to a diverse group of voters in a state far more representative of the country as a whole than Iowa and New Hampshire. Sanders won by rallying his fiercely loyal base and tapping into support from the state's large Latino community.

In a show of confidence, Sanders left Nevada on Saturday for Texas, which offers one of the biggest delegate troves in just 10 days on Super Tuesday.

Saturday's win built on his victory earlier this month in the New Hampshire primary. He essentially tied for first place in the Iowa caucuses with Buttigieg, who has sought to position himself as an ideological counter to Sanders’ unabashedly progressive politics.

But for all the energy and attention devoted to the first three states, they award only a tiny fraction of the delegates needed to capture the nomination. After South Carolina, the contest becomes national in scope, putting a premium on candidates who have the resources to compete in states as large as California and Texas.

That when Bloomberg, the former New York mayor who dominated the political conversation this week after a poor debate-stage debut, intends to become a factor after skipping the first four contests.

The stakes were high for Nevada Democrats to avoid a repeat of the chaos in the still-unresolved Iowa caucuses, and it appeared Saturday’s contest was largely successful.

Nevada Democrats sought to minimize problems by creating multiple redundancies in their reporting system, relying on results called in by phone, a paper worksheet filled out by caucus organizers, a photo of that worksheet sent in by text message and electronic results captured with a Google form.

Buttigieg’s campaign is raising questions about the results, citing more than 200 reports of problems allocating votes. It wants the state party to disclose more details of the votes and address concerns before releasing final results. But the party said it was not planning to offer a more detailed voting breakdown and appeared to be inviting the campaign to follow recount rules if it wanted to challenge the results.

LAS VEGAS (AP) — From the opening bell, Democrats savaged New York billionaire Mike Bloomberg and raised pointed questions about Bernie Sanders' take-no-prisoners politics during a contentious debate Wednesday night that threatened to further muddy the party's urgent quest to defeat President Donald Trump.

Bloomberg, the former New York mayor who was once a Republican, was forced to defend his record and past comments related to race, gender and his personal wealth in an occasionally rocky debate stage debut. Sanders, meanwhile, tried to beat back pointed questions about his embrace of democratic socialism and his health following a heart attack last year.

The ninth debate of this cycle featured the most aggressive sustained period of infighting in the Democrats’ yearlong search for a presidential nominee. The tension reflected growing anxiety among candidates and party leaders that the nomination fight could yield a candidate who will struggle to build a winning coalition in November to beat Trump.

The campaign is about to quickly intensify. Nevada votes on Saturday and South Carolina follows on February 29. More than a dozen states host Super Tuesday contests in less than two weeks with about one-third of the delegates needed to win the nomination at stake.

Massachusetts Sen. Elizabeth Warren was in a fight for survival and stood out with repeated attacks on Bloomberg. She sought to undermine him with core Democratic voters who are uncomfortable with his vast wealth, his offensive remarks about policing of minorities and demeaning comments about women, including those who worked at his company.

Warren labeled Bloomberg "a billionaire who calls people fat broads and horse-faced lesbians."

She wasn’t alone.

Sanders lashed out at Bloomberg's policing policies as New York City mayor that he said targeted “African-American and Latinos in an outrageous way."

And former Vice President Joe Biden charged that Bloomberg’s “stop-and-frisk” policy ended up “throwing 5 million black men up against the wall.”

Watching from afar, Trump joined the Bloomberg pile on.

“I hear he's getting pounded tonight, you know he's in a debate,” Trump said at a rally in Phoenix.

After the debate, Warren told reporters: "I have no doubt that Michael Bloomberg is reaching in his pocket right now, and spending another hundred million dollars to try to erase every American's memory about what happened on the debate stage."

On a night that threatened to tarnish the shine of his carefully constructed TV-ad image, Bloomberg faltered when attacked on issues related to race and gender. But he was firm and unapologetic about his wealth and how he has used it to effect change important to Democrats. He took particular aim at Sanders and his self-description as a democratic socialist.

“I don’t think there's any chance of the senator beating Donald Trump," Bloomberg declared before noting Sanders' rising wealth. "The best known socialist in the country happens to be a millionaire with three houses!"

Sanders defended owning multiple houses, noting he has one in Washington, where he works, and two in Vermont, the state he represents in the Senate.

While Bloomberg was the shiny new object Wednesday, the debate also marked a major test for Sanders, who is emerging as the front-runner in the Democrats’ nomination fight, whether his party’s establishment likes it or not. A growing group of donors, elected officials and political operatives fear that Sanders’ uncompromising progressive politics could be a disaster in the general election against Trump, yet they’ve struggled to coalesce behind a single moderate alternative.

Pete Buttigieg, the former mayor of South Bend, Indiana, went after both Bloomberg and Sanders, warning that one threatened to “burn down” the Democratic Party and the other was trying to buy it.

He called them “the two most polarizing figures on this stage," with little chance of defeating Trump or helping congressional Democrats in contests with Republicans.

Bloomberg and Sanders were prime targets, but the stakes were no less dire for the other four candidates on stage.

Longtime establishment favorite Biden, a two-term vice president, desperately needed to breathe new life into his flailing campaign, which entered the night at the bottom of a moderate muddle behind Buttigieg and Minnesota Sen. Amy Klobuchar. And after a bad finish last week in New Hampshire, Warren was fighting to resurrect her stalled White House bid.

A Warren campaign aide said on Twitter that her fiery first hour of debate was her best hour of fundraising "to date."

The other leading progressive in the race, Sanders came under attack from Biden and Bloomberg for his embrace of democratic socialism.

Sanders, as he has repeatedly over the last year, defended the cost of his signature “Medicare for All” healthcare plan, which would eliminate the private insurance industry in favor of a government-backed healthcare system that would cover all Americans.

"When you asked Bernie how much it cost last time he said...'We'll find out,’” Biden quipped. “It costs over $35 trillion, let's get real."

And ongoing animosity flared between Buttigieg and Klobuchar when the former Indiana mayor slammed the three-term Minnesota senator for failing to answer questions in a recent interview about Mexican policy and forgetting the name of the Mexican president.

Buttigieg noted that she's on a committee that oversees trade issues in Mexico and she “was not able to speak to literally the first thing about the politics of the country.”

She shot back: "Are you trying to say I'm dumb? Are you mocking me here?"

Later in the night she lashed out at Buttigieg again: “I wish everyone else was as perfect as you, Pete.”

The debate closed with a question about the possibility that Democrats remain divided deep into the primary season with a final resolution coming during a contested national convention in July.

Asked if the candidate with the most delegates should be the nominee -- even if he or she is short of a delegate majority, almost every candidate suggested that the convention process should "work its way out," as Biden put it.

Sanders, who helped force changes to the nomination process this year and hopes to take a significant delegate lead in the coming weeks, was the only exception.

“The person who has the most votes should become the nominee,” he said.

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Peoples and Jaffe reported from Washington. Associated Press writer Kathleen Ronayne in Sacramento, California, contributed to this report.

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