Sen. Bernie Sanders Bernie SandersMcConnell accuses Democrats of sowing division by 'downplaying progress' on election security The Hill's Campaign Report: Arizona shifts towards Biden | Biden prepares for drive-in town hall | New Biden ad targets Latino voters Why Democrats must confront extreme left wing incitement to violence MORE's (I-Vt.) Democratic presidential campaign announced on Sunday that it had raised $20 million in the past month.

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The campaign said in a statement that almost all of the money came in small-dollar online contributions, averaging about $27 each.

The campaign also claimed that 99.9 of donors gave less than the maximum legal limit, and are eligible to contribute more.

The figure was touted by Sanders's campaign manager, Jeff Weaver, as a sign that the Vermont senator is keeping pace with rival Hillary Clinton Hillary Diane Rodham ClintonHillicon Valley: FBI chief says Russia is trying to interfere in election to undermine Biden | Treasury Dept. sanctions Iranian government-backed hackers The Hill's Campaign Report: Arizona shifts towards Biden | Biden prepares for drive-in town hall | New Biden ad targets Latino voters FBI chief says Russia is trying to interfere in election to undermine Biden MORE, despite relying on much smaller donations.

“The numbers we’ve seen since Jan. 1 put our campaign on pace to beat Secretary Clinton’s goal of $50 million in the first quarter of 2016,” Weaver said in the statement.

“Working Americans chipping in a few dollars each month are not only challenging but beating the greatest fundraising machine ever assembled.”

Sanders's campaign had recently announced that it raised $33 million over the last three months of 2015.

Meanwhile, Hillary Clinton's campaign announced it had raised in $37 million to end 2015.

Weaver sought to contrast Sanders's fundraising efforts with those of Clinton, emphasizing that the Vermont senator is relying on grassroots support.

“As Secretary Clinton holds high-dollar fundraisers with the nation’s financial elite, our supporters have stepped up in a way that allows Bernie to spend the critical days before the caucuses talking to Iowans about his plans to fix a rigged economy and end a corrupt system of campaign finance,” Weaver said.

“Bernie's campaign is built for the long haul and we look forward to bringing his message to voters all across the nation, and to drawing millions of new people into the Democratic Party primary process."

--This report was updated at 2:02 p.m.