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.) on Sunday pushed back on criticism from former Democratic presidential nominee Hillary Clinton Hillary Diane Rodham ClintonJeff Flake: Republicans 'should hold the same position' on SCOTUS vacancy as 2016 Momentum growing among Republicans for Supreme Court vote before Election Day Warning signs flash for Lindsey Graham in South Carolina MORE, arguing that he worked as hard as he could to help her win the White House.

“I worked as hard as I could to see that Hillary Clinton would be elected president,” Sanders told NBC’s “Meet the Press.”

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Sanders said that it is “the nature of politics” that some of his supporters declined to support Clinton in the general election.

“That’s what happens in politics,” he said.

Clinton, whose book “What Happened” about her election loss came out last week, has blamed Sanders for inflicting “lasting damage” on her campaign.

“I don’t think it’s useful to go backwards. I think we’ve got to go forwards,” Sanders said Sunday.