Democratic presidential front-runner 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 raised about $29.5 million in March, her campaign announced Monday.

That compares to rival 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 record-breaking $44 million raised in March.

Clinton began April with nearly $29 million on hand; the Sanders campaign has not announced its cash on hand total.

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The Clinton campaign said it beat its first-quarter fundraising goal of $50 million, raising nearly $75 million in the first quarter.

More than half of Clinton's donations in March were online grassroots donations, the campaign said. The Clinton campaign has received donations from more than 1 million people.

"By making smart investments and beating our first quarter fundraising goal by nearly 50 percent, we've been able to build a nearly insurmountable pledged delegate lead and earned 2.5 million more votes than our opponent," campaign manager Robby Mook said in a statement.

"As Hillary Clinton has progressed through the primary, we've seen a surge of grassroots support across the country and are thrilled that we now have more than one million contributors to this campaign, most of whom have given less than $100."

Sanders’s campaign says it has raised 6.5 million contributions from 2 million donors, with an average donation of $27. Raising 97 percent of its funds online, the Sanders campaign is seen to have broken new ground for online political fundraising.