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 played a game of "Who'd You Rather" to try to choose her running mate, quickly ruling out 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.

Appearing on "The Ellen DeGeneres Show" in an episode airing Wednesday, Clinton was asked to choose who she'd want as a running mate as two famous people appeared on a screen.

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"We'll keep switching until you narrow it down," DeGeneres said.

"This is very helpful," Clinton said. "Don't tell anybody because we want it to be a big surprise."

In a matchup between Mark Cuban and Vice President Biden, Clinton quickly chose Biden. But Biden was eliminated when he appeared against actor Tony Goldwyn.

Sanders picture then came up. But in a matchup between Goldwyn and Sanders, Clinton didn't hesitate.

"Gotta go with Tony," Clinton said.

The game continued, with potential picks including Leonardo DiCaprio, Beyoncé and Michelle Obama Michelle LeVaughn Robinson ObamaTo honor Justice Ginsburg's legacy, Biden should consider Michelle Obama National Urban League, BET launch National Black Voter Day The Hill's Morning Report - Sponsored by The Air Line Pilots Association - White House moves closer to Pelosi on virus relief bill MORE.

During the interview, Clinton said she understands why Sanders is staying in the race until the end, noting she ran against then-Sen. Barack Obama Barack Hussein ObamaMomentum growing among Republicans for Supreme Court vote before Election Day Warning signs flash for Lindsey Graham in South Carolina Majority of voters say Trump should not nominate a Supreme Court justice: poll MORE "all the way to the end" in 2008.

"And when it was over, because we had a much closer race than the one currently is between Senator Sanders and myself, I withdrew," she said.

"I endorsed him, and I worked really hard to elect him, and I do believe that Bernie will do that."