Sen. Bernie Sanders Bernie SandersNYT editorial board remembers Ginsburg: She 'will forever have two legacies' Two GOP governors urge Republicans to hold off on Supreme Court nominee Sanders knocks McConnell: He's going against Ginsburg's 'dying wishes' MORE (I-Vt.) and Larry David — who impersonated Sanders on "Saturday Night Live" last year — were both surprised to find they were actually related.

In a released clip from the season four premiere of "Finding Your Roots," a PBS program in which celebrities learn more about their lineage and history, the two are told that if they both have long identical stretches of DNA then it means they are cousins.

When told Sanders is his cousin, David responds: "What the hell?"

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"That is really funny. That is amazing. ... Alright, cousin Bernie," David says.

"You're kidding," Sanders says in response, laughing.

"That is unbelievable," he adds.

"People say to me, they talk about Larry David, and I say he does a better Bernie Sanders than I do," Sanders says.