2016 Campaign Fundraising: Who's Up and Who's Down

— -- The top Democratic presidential candidates are outpacing top Republicans in the third quarter campaign race fundraising race.

Hillary Clinton led the pack with more than $28 million raised over the summer, but Bernie Sanders followed closely behind with $26 million, according to their campaigns and FEC reports.

Republican Ben Carson raised more than $20 million, according to his campaign. Compare that to Jeb Bush, who raised $13.4 million over the last three months -– just 22 percent more than the $11 million he raised in the first two weeks of his campaign.

The reports show that Scott Walker burned through $6.4 million -– most of the $7.4 million that he took in during the course of his campaign -– before dropping out of the race. Rick Perry also spent about four times as much as he took in before he dropped out, according to FEC reports.

Some campaigns are struggling with how quickly they are going through money. Rand Paul has $2.5 million and Bobby Jindal only has $260,000, according to FEC reports. But they spent more than they took in -- 180 percent and 140 percent, respectively. Paul has also already loaned himself money from his Senate campaign.

Donald Trump, who says he did not want donations to his campaign, has raised $3.8 million -– more than many other Republicans in the race. He has also given himself another $100,000 over the summer. He spent $4 million on his campaign in the last three months.

“What is really remarkable is the breadth of support for Bernie from so many people responding to his call for a political revolution to stand up for the middle class and take on the billionaire class,” said Jeff Weaver, Sanders' campaign manager.

Trump said he was proud of his efforts.

"To be number one in every poll, both state and national, and to have spent the least amount of dollars of any serious candidate is a testament to what I can do for America," Trump said. "This is what our country's leaders should do for the United States--- spend money wisely and win!"

ABC News' Paola Chavez, Lissette Rodriguez, Corinne Cathcart and Veronica Stracqualursi contributed to this report.