“Bernie is proud to be the only candidate running to defeat Donald Trump who is 100 percent funded by grassroots donations — both in the primary and in the general” elections, Sanders campaign manager Faiz Shakir said. “Media elites and professional pundits have tried repeatedly to dismiss this campaign, and yet working-class Americans keep saying loudly and clearly that they want a political revolution.”

The third quarter was Sanders' most successful fundraising period of his 2020 campaign. He raised about $18 million in each of the first two quarters of the year.

Sanders' aides said the second best fundraising day of the year was Monday, when Sanders announced a plan to tax high-earning CEOs in an effort to reduce the widening gap between the nation's rich and poor.

Though Shakir did not mention Warren by name, his statement could be interpreted as a reference in part to Sanders' 2020 opponent, who said she would not participate in big-money fundraisers in the primary but would not unilaterally disarm against Trump in a general election. Sanders has sworn off high-dollar fundraisers for the entire campaign.

Sanders' team said he also transferred an extra $2.6 million from his other campaign accounts, but that figure is not included in the reported haul of $25.3 million.