President-elect Donald Trump Donald John TrumpBiden on Trump's refusal to commit to peaceful transfer of power: 'What country are we in?' Romney: 'Unthinkable and unacceptable' to not commit to peaceful transition of power Two Louisville police officers shot amid Breonna Taylor grand jury protests MORE on Tuesday blasted Bill Clinton William (Bill) Jefferson ClintonEpstein podcast host says he affiliated with elites from 'both sides of the aisle' Ruth Bader Ginsburg lies in repose at Supreme Court Business groups start gaming out a Biden administration MORE and mocked Hillary Clinton Hillary Diane Rodham ClintonDemocratic groups using Bloomberg money to launch M in Spanish language ads in Florida The Hill's Campaign Report: Presidential polls tighten weeks out from Election Day More than 50 Latino faith leaders endorse Biden MORE's campaign strategy after the former president said Trump "doesn't know much."

"Bill Clinton stated that I called him after the election. Wrong, he called me (with a very nice congratulations)," Trump tweeted.

"He 'doesn't know much' ... especially how to get people, even with an unlimited budget, out to vote in the vital swing states ( and more). They focused on wrong states," he added moments later.

Bill Clinton stated that I called him after the election. Wrong, he called me (with a very nice congratulations). He "doesn't know much" ... — Donald J. Trump (@realDonaldTrump) December 20, 2016

especially how to get people, even with an unlimited budget, out to vote in the vital swing states ( and more). They focused on wrong states — Donald J. Trump (@realDonaldTrump) December 20, 2016

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Bill Clinton told a local newspaper earlier this month the president-elect "doesn't know much."

"One thing he does know is how to get angry, white men to vote for him," Clinton added.

He also told a reporter from The Record-Review he had received a phone call from Trump the day after the election. He said Trump acted during the phone call "like it was 15 years ago," when the Clintons and Trumps used to be friendly.

Clinton responded to Trump's tweets Tuesday afternoon, writing: "Here’s one thing @realDonaldTrump and I can agree on — I called him after the election."