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 labeled Democratic presidential hopeful 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 as "Crazy Bernie" on Wednesday while predicting 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 will be the eventual Democratic nominee.

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While touting his own wins in West Virginia and Nebraska the previous night, where he faced no challengers, Trump, the presumptive Republican presidential nominee, argued he'd fair well against Clinton.

"I don't want to hit Crazy Bernie Sanders too hard yet because I love watching what he is doing to Crooked Hillary. His time will come!" Trump tweeted.

I don't want to hit Crazy Bernie Sanders too hard yet because I love watching what he is doing to Crooked Hillary. His time will come! — Donald J. Trump (@realDonaldTrump) May 11, 2016

Trump reiterated the "Crazy Bernie" moniker during an interview Wednesday morning on "Fox and Friends," going after the self-described democratic socialist, whose criticism of Clinton's "bad judgment" Trump has coopted.

"I call him 'Crazy Bernie' because he's not very good," Trump said. "Who's going to run against a socialist and lose?"

Sanders picked up a win in the West Virginia primary Tuesday over Clinton. The victory does little to close the delegate gap, however, but delays Clinton's attempt to lock up the Democratic nomination.

"Everything really about Hillary is rigged. She looks like she'll be able to run," Trump said, referring to the federal probe into her email arrangement that appears to be coming to a close.