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.) will be returning to the campaign trail next month to stump for Democratic presidential nominee Hillary Clinton Hillary Diane Rodham ClintonBiden leads Trump by 36 points nationally among Latinos: poll Democratic super PAC to hit Trump in battleground states over coronavirus deaths Battle lines drawn on precedent in Supreme Court fight MORE.

"I look forward to it," Sanders told The Washington Post Friday.

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"I feel very strongly that Donald Trump Donald John TrumpBiden leads Trump by 36 points nationally among Latinos: poll Trump dismisses climate change role in fires, says Newsom needs to manage forest better Jimmy Kimmel hits Trump for rallies while hosting Emmy Awards MORE would be a disaster for the country. I want to do everything I can to see that Secretary Clinton wins."

Sanders spent a year on the trail for his own presidential campaign, before dropping out and endorsing Clinton last month.

He spoke on her behalf at the Democratic National Convention, but faced backlash from some of his supporters who say Clinton benefited from a rigged primary process.

Sanders has pleaded with his supporters to back Clinton. Now he's expected to hit the campaign trail to target the working-class and younger voters.

He plans to visit New Hampshire, Maine, Michigan and Wisconsin — all states where he won primaries and caucuses — as well as others were he had strong support such as Ohio, Pennsylvania and Nevada.

He'll also campaign for Democratic Senate candidates including Katie McGinty in Pennsylvania, Ted Strickland in Ohio and Maggie Hassan in New Hampshire.