Democratic voters want Democratic presidential front-runner 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 to make rival 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 her running mate, according to a new poll.

Thirty-six percent say they'd like the Vermont senator to be Clinton's vice president, a Rasmussen Reports survey released Tuesday found.

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Sen. Elizabeth Warren Elizabeth WarrenBiden's fiscal program: What is the likely market impact? Warren, Schumer introduce plan for next president to cancel ,000 in student debt The Hill's 12:30 Report - Presented by Facebook - Don't expect a government check anytime soon MORE (D-Mass.) came in second at 19 percent, followed by Housing and Urban Development Secretary Julián Castro at 10 percent.

Eight percent said Sen. Corey Booker (D-N.J.), while 2 percent chose former Maryland Gov. Martin O’Malley. Twelve percent of Democrats prefer an unlisted candidate, while 13 percent are undecided.

Thirty-two percent of Democratic voters said it’s “very important” that their party fields a ticket consisting of only Democrats.

The poll of 1,000 likely voters was conducted via telephone interviews from May 11 to 12. It has a margin of error of 3 percentage points.

Sanders is Clinton's only remaining challenger for the Democratic presidential nomination, although he's far behind in the race.

Clinton has 1,716 pledged delegates entering Tuesday to Sanders's 1,433, according to The Associated Press.