Democratic presidential candidate 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 on Wednesday slammed Republican presidential front-runner 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 for his comments on abortion, calling them "shameful."

"Your Republican frontrunner, ladies and gentlemen. Shameful," the Vermont senator tweeted Wednesday, sharing a tweet about Trump's comments.

Your Republican frontrunner, ladies and gentlemen. Shameful. https://t.co/y49Z8YfRgV — Bernie Sanders (@BernieSanders) March 30, 2016

Democratic front-runner 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 also slammed Trump, saying his comments were "horrific and telling."

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Trump said Wednesday that if abortions were illegal, there would need to be a punishment for women who have them.

In an MSNBC taped town hall interview airing later Wednesday, host Chris Matthews asked Trump whether abortions should be illegal.

“Look, people in certain parts of the Republican Party, conservative Republicans, would say, ‘Yes, it should,’ ” Trump said.

Pressed further, Trump added: “Well, you go back to a position like they had where they would perhaps go to illegal places, but we have to ban it."

Trump said that "there has to be some form of punishment" for women who get abortions illegally.

He didn't give a specific punishment, instead saying it would "have to be determined."