Bernie Sanders has zero endorsements from elected national Democrats in his bid for the White House, while his opponent Hillary Clinton has accumulated more than any other presidential hopeful by far.

Fifty-six percent of Democrat governors, senators and U.S. House members have endorsed Clinton, according to data from FiveThirtyEight. Endorsements can be key for building momentum and boosting the fundraising base.

Though Sanders has been improving in the polls in recent months, Clinton still dwarfs him in endorsements. Joe Biden comes in second with 1.2 percent support.

Martin O’Malley, who recently tried his hand at acoustic guitar on Wall Street, only has one U.S. House member supporting him.

Recent poll data showed Sanders topping Clinton beyond the normal margin of error in New Hampshire, a crucial early state. But endorsements can give a candidate stability despite shifting polls.

“I believe her endorsement lead is the best possible insulation against challenges to her front-runner status,” Marty Cohen, an assistant professor at James Madison University told The Washington Post.

On the Republican side, Jeb Bush has the most endorsements, according to the data.

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