Progressive organization MoveOn.org announced Tuesday that it is endorsing Sen. Bernie Sanders for president after a record amount of members voted to support him.

Sanders achieved the largest margin of victory in the organization’s history receiving 267,750 votes (78.6 percent). While Hillary Clinton only gained 14.6 percent of the more than 340,000 votes and former Maryland Gov. Martin O’Malley received less than one percent of support.

[dcquiz] MoveOn.org has more than 8 million members and the organization endorsed then Sen. Obama in 2008 much to Clinton’s detriment. In April 2008, she privately told donors, “We have been less successful in caucuses because [MoveOn.org] brings out the activist base of the Democratic Party.”

Although Clinton is running ads claiming she is the only one who can beat a Republican, MoveOn.org listed Bernie’s electability as a top 5 reason it is endorsing him.