Story highlights Bernie Sanders' campaign will clarify an incorrect fundraising email they sent Tuesday that alleged some Hillary Clinton supporters paid $27,000 individually to attend a fundraiser

In fact, the invites said hosts should bundle $27,000 but no attendees paid that amount to attend individually

Columbia, South Carolina (CNN) Bernie Sanders' campaign will clarify an incorrect fundraising email they sent Tuesday morning that claimed Hillary Clinton's campaign was charging "some donors" $27,000 to attend a fundraiser in Los Angeles on Monday night.

"It's no exaggeration to say this is the most important stretch of our campaign," reads the email. "Secretary Clinton's supporters are responding: her campaign is holding at least a dozen high-dollar fundraisers this week, including one last night where some donors paid $27,000 to attend."

After sending the email Tuesday, Mike Casca, Sanders' rapid response spokesman, acknowledged the email needed clarification.

"Our supporters are really fired up about Clinton's high-dollar fundraising, so when we send another fundraising email about it tonight we'll be sure to clarify that the high-dollar donors 'bundled' instead of 'donated' $27,000, which is more than the annual salary of a worker making $12 per hour," Casca said.

Sanders has sought to make Clinton's fundraising practices, which are far more focused on high-dollar donors than his, an issue in the Democratic nomination fight.

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