CALIFORNIA Hillary Clinton declared herself the Democratic Party nominee for U.S. president on Tuesday, embracing her role in history as the first woman to lead a major party in a race for the White House.

The former first lady, U.S. senator and secretary of state celebrated her victory in the nominating race over rival Bernie Sanders at a raucous event with supporters in Brooklyn, New York, where Clinton placed her achievement in the context of the long history of the women’s rights movement.

“Thanks to you, we have reached a milestone,” Clinton said in a speech. “We all owe so much to who came before.”

Clinton, 68, spoke shortly after beating Sanders in New Jersey’s nominating contest, expanding her lead in the delegates needed to clinch the nomination and setting up a five-month general election campaign against presumptive Republican nominee Donald Trump in the Nov. 8 election.

New Jersey was one of six states holding contests on Tuesday, including California, the big prize where Clinton was still at risk of an embarrassing loss to Sanders as she heads into the campaign against Trump.

Polls in California closed at 11 p.m. EDT, but news networks said the race was too close to call.

In her speech, Clinton appealed to Sanders supporters to join her and said the Democratic Party had been bolstered by his campaign for eradicating income inequality, which has commanded huge crowds and galvanized younger voters.

Clinton edged Sanders out, especially among older voters, with a more pragmatic campaign focused on building on the policies of her fellow Democrat, President Barack Obama.

Although Sanders will be unable to catch Clinton even if he wins the primary in California, America’s most populous state, a triumph there could fuel his continued presence in the race and underscore Clinton’s weaknesses as she battles Trump.

The White House issued a statement saying Obama had called both Clinton and Sanders on Tuesday. It said he congratulated her on securing the delegates necessary to clinch the nomination and would meet Sanders on Thursday at Sanders’ request.

TRUMP ‘TEMPERAMENTALLY UNFIT’

Clinton harshly attacked Trump for using divisive rhetoric that belittled women, Muslims and immigrants, and took specific aim at his recent condemnation of an Indiana-born judge of Mexican heritage.

“The stakes in this election are high and the choice is clear. Donald Trump is temperamentally unfit to be president and commander-in-chief,” she said.

“When Donald Trump says a distinguished judge born in Indiana can’t do his job because of his Mexican heritage, or he mocks a reporter with disabilities, or calls women pigs, it goes against everything we stand for,” she said.

Clinton also won in New Mexico and South Dakota and narrowly led in Montana, while Sanders, 74, was projected to win in North Dakota on the final night of big presidential nominating battles that began on Feb. 1 in Iowa. The District of Columbia, the last to vote, holds a Democratic primary next Tuesday.

In a fundraising email to supporters, Clinton declared her campaign had broken “one of the highest, hardest glass ceilings.”

On Twitter, she said: “To every little girl who dreams big: Yes, you can be anything you want – even president. Tonight is for you.”

Clinton’s race against Trump, 69, will unfold amid an ongoing investigation of her use of a personal email server while secretary of state. Opinion polls show the controversy has hurt Clinton’s ratings on honesty and trustworthiness.

A Reuters/Ipsos poll released on Tuesday showed Clinton leads Trump by 10 percentage points nationally as they launch their general election battle, little changed from a week ago.

PARTY UNITY

Clinton now must try to unify the party and win over Sanders supporters. But Sanders, a democratic socialist U.S. senator from Vermont, has vowed to stay in the race until July’s party convention that formally picks the nominee, defying growing pressure from party leaders to exit the race.

A Sanders campaign spokesman castigated what he said was the media’s “rush to judgment” after the Associated Press and NBC reported on Monday night that Clinton had clinched the number of delegates needed to win the nomination.

Clinton’s victories on Tuesday ensured she will have a lead in the pledged delegates won in nominating contests. Clinton clinched the nomination with the added support of superdelegates, party leaders who are free to back any candidate.

Steven Acosta, a 47-year-old teacher living in Los Angeles, voted for Clinton on Tuesday, saying that was partly because he believed she stood a better chance of winning in November.

“I like what Bernie Sanders says and I agree with almost everything that he says,” Acosta said. “The problem is that I think Republicans would really unify … even more against him.”

Trump, who became his party’s presumptive nominee last month, outlasting 16 Republican challengers, is struggling to get the party’s leaders solidly behind him after a bitter primary campaign during which he made a series of controversial statements directed at Muslims, Latinos, women and the disabled.

On Tuesday night he addressed a crowd of supporters in New York, welcoming Sanders supporters “with open arms” should they decide to support him and declaring a new phase of the campaign had begun.

“I am going to give a major speech on probably Monday of next week, and we are going to be discussing all of the things that have taken place with the Clintons,” he said. “I think you are going to find it very informative and very, very interesting. I wonder if the press will want to attend.”