Ralph Nader says Hillary Clinton Hillary Diane Rodham ClintonWhat Senate Republicans have said about election-year Supreme Court vacancies Bipartisan praise pours in after Ginsburg's death Trump carries on with rally, unaware of Ginsburg's death MORE is "going to win by dictatorship" in her Democratic primary race against Bernie Sanders Bernie SandersKenosha will be a good bellwether in 2020 Biden's fiscal program: What is the likely market impact? McConnell accuses Democrats of sowing division by 'downplaying progress' on election security MORE.

"Twenty-five percent of superdelegates are cronies, mostly. They weren't elected," Nader, an activist and former Green Party presidential candidate, told U.S. News in a story published Friday .

"They were there in order to stop somebody like Bernie Sanders, who would win by the vote."

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Clinton, the Democratic front-runner in the race for the White House, has secured 2,240 of the 2,383 delegates needed to clinch her party's nomination, according to the Associated Press delegate tracker. That includes the backing of 524 superdelegates, the unbound powerbrokers who make their vote at the July convention. Sanders has tried to woo these votes to his sidel the Vermont senator has 1,473 delegates total, including just 40 superdelegates.

Sanders is vowing to fight until the Democratic National Convention in late July, citing his "momentum" from winning recent states. Still, Clinton has won some 3 million more votes than Sanders during the primaries.

Nader told U.S. News he thinks Sanders "made very few mistakes" during his White House bid and would present a bigger challenge to presumptive Republican nominee Donald Trump Donald John TrumpObama calls on Senate not to fill Ginsburg's vacancy until after election Planned Parenthood: 'The fate of our rights' depends on Ginsburg replacement Progressive group to spend M in ad campaign on Supreme Court vacancy MORE in November.

"[H]e couldn't do anything about the superdelegates. But he almost won and he would've won," Nader said. "He would've defeated Trump easily, much more easily than [Clinton] would've defeated him."

"He doesn't produce gaffes. He's very consistent and he's scandal-free. What politician 35 years in office is scandal-free?"