The end-of-quarter fundraising scramble is on for the Democratic presidential hopefuls, with U.S. Sen. Bernie Sanders touting 1 million individual donors while some of his rivals struggle to stay in the race — or drop out.

New York Mayor Bill de Blasio exited the race Friday after posting low fundraising and failing to catch on in the polls.

Sanders’ team said he’s the fastest candidate in history to achieve the million-donor milestone. Campaign manager Faiz Shakir said, “With 1 million contributors, this is the only Democratic campaign that has more supporters than Donald Trump.”

In New Hampshire, home of the first-in-the-nation primary, Sanders has counted 8,069 donors since his campaign launch in February. There were 278,134 registered Democrats in New Hampshire as of May, and 410,389 independents, according to the secretary of state.

Sanders raised the second-most of the Democratic field in the Granite State during the second quarter, surpassed only by South Bend, Ind., Mayor Pete Buttigieg. Buttigieg topped the field with $24.8 million in that time period, while Sanders finished fourth with $18 million overall.

Several candidates attempted to fundraise off Sanders’ announcement, including former Vice President Joe Biden and U.S. Sen. Kamala Harris — who are leaning heavily on big-donor fundraisers to close out the quarter — and former Texas U.S. Rep. Beto O’Rourke.

“If you post good numbers, people say good things about your campaign. If you post bad numbers, they say you’re doomed!” wrote O’Rourke’s campaign manager, Jen O’Malley Dillon.

Cory Booker’s team put out a plea for $1.7 million in donations by the end of the month, with the New Jersey senator writing in an email to supporters, “The next ten days will determine whether I have a path in this race.”

Candidates are also fearful of the Democratic National Committee raising the stakes to qualify for future debates. The third and fourth rounds required at least 2% support in four qualifying polls and at least 130,000 individual donors — with 400 apiece in 20 states. That’s up from 1% support in three qualifying polls or 65,000 unique donors, with 200 each in 20 states, for the first two rounds.

Eleven candidates say they’ve made the stage for the October debate in Ohio, including Biden, Sanders, Harris, Booker, Buttigieg, O’Rourke, U.S. Sens. Elizabeth Warren and Amy Klobuchar, former Secretary of Housing and Urban Development Julián Castro, entrepreneur Andrew Yang and billionaire Tom Steyer.

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President Trump’s campaign stepped up attacks on his rivals this week, saying Democrats pushing to eliminate fossil fuels will “destroy America’s economy.”

But Democrats seized on the allegations that Trump reportedly urged Ukraine’s leader this summer to investigate Biden’s son.

“Trump deserves to be investigated. He is violating every basic norm of a president,” Biden told reporters in Iowa Saturday.

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Seventeen Democratic presidential hopefuls were in Iowa this weekend for the Polk County Steak Fry. Harris, who’s struggled to maintain momentum since a breakout performance in the first debate, is doubling her field operations in the state. But political watchers have been warning that she’s not doing enough in the early primary states.

Harris said being in New Hampshire “is a top priority going forward” during her fifth visit to the state for the Democratic convention earlier this month. “It’s a very important state.”

Herald wire services contributed to this report.