Story highlights Both Democratic presidential hopefuls have signed joint fundraising efforts with the Democratic National Committee

Bernie Sanders' campaign is charging Hillary Clinton with "laundering" donations

Williamson, West Virginia (CNN) Hillary Clinton and Bernie Sanders campaign spent part of Monday fighting over how much money the front-runner's operation has actually raised for state parties, with Sanders' campaign charging Clinton with "laundering" donations.

Both Democratic campaigns have signed joint fundraising efforts with the Democratic National Committee, allowing the presidential campaigns to raise money for the Democratic committee and a host of state Democratic parties. Because of federal election rules, campaigns are allowed to raise upwards of $350,000 from individuals for joint fundraising efforts.

But Clinton has been the only candidate to use it, raising, according to her campaign, $46 million for the DNC and state parties through the Hillary Victory Fund, the Clinton campaign's joint fundraising effort.

Politico reported on Monday that Clinton's campaign has only transferred $3.8 million to the state parities, with almost 88% of that being transferred to the DNC after being sent to the states. Sanders campaign jumped on the report, blasting the story out to reporters and following up with a statement.

"Secretary Clinton is looting funds meant for the state parties to skirt fundraising limits on her presidential campaign," Jeff Weaver, Sanders' campaign manger, said in a statement Monday. "We think the Clinton campaign should let the state parties keep their fair share of the cash."

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