President 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 hit congressional Democrats early Thursday, saying lawmakers on Capitol Hill cannot "investigate and legislate at the same time."

"The Democrats are getting nothing done in Congress. All of their effort is about a Re-Do of the Mueller Report, which didn’t turn out the way they wanted," Trump wrote on Twitter. "It is not possible for them to investigate and legislate at the same time."

The president went on to accuse Democrats of being focused on "trying to find anything which will be bad for me."

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"Their heart is not into Infrastructure, lower ... drug prices, pre-existing conditions and our great Vets. All they are geared up to do, six committees, is squander time, day after day, trying to find anything which will be bad for me," he tweeted.

"A pure fishing expedition like this never happened before, & it should never happen again!"

The Democrats are getting nothing done in Congress. All of their effort is about a Re-Do of the Mueller Report, which didn’t turn out the way they wanted. It is not possible for them to investigate and legislate at the same time. Their heart is not into Infrastructure, lower..... — Donald J. Trump (@realDonaldTrump) May 23, 2019

....drug prices, pre-existing conditions and our great Vets. All they are geared up to do, six committees, is squander time, day after day, trying to find anything which will be bad for me. A pure fishing expedition like this never happened before, & it should never happen again! — Donald J. Trump (@realDonaldTrump) May 23, 2019

The Democrats have become known as THE DO NOTHING PARTY! — Donald J. Trump (@realDonaldTrump) May 23, 2019

Trump's comments came one day after he abruptly ended an infrastructure meeting with Democratic leaders.

The president cut off a meeting with House Speaker Nancy Pelosi Nancy PelosiHoyer: House should vote on COVID-19 aid — with or without a bipartisan deal Ruth Bader Ginsburg lies in repose at Supreme Court McCarthy threatens motion to oust Pelosi if she moves forward with impeachment MORE (D-Calif.) and Senate Minority Leader Charles Schumer Chuck SchumerCruz blocks amended resolution honoring Ginsburg over language about her dying wish Senate Democrats introduce legislation to probe politicization of pandemic response Schumer interrupted during live briefing by heckler: 'Stop lying to the people' MORE (D-N.Y.) after Pelosi accused the president of engaging in a "cover-up." Trump, appearing in the White House Rose Garden shortly after the meeting, said the negotiations would not resume until Democrats ended their investigations into him.

Democrats have become increasingly frustrated in recent days as the White House has ramped up its effort to stonewall their investigations into Trump’s administration, campaign and businesses.

The White House instructed former White House counsel Don McGahn not to testify on Tuesday to the House Judiciary Committee, blocking Democrats' chance to hear from a key witness in special counsel Robert Mueller Robert (Bob) MuellerCNN's Toobin warns McCabe is in 'perilous condition' with emboldened Trump CNN anchor rips Trump over Stone while evoking Clinton-Lynch tarmac meeting The Hill's 12:30 Report: New Hampshire fallout MORE's Russia investigation. The White House also invoked executive privilege to block the release of Mueller’s full report on Moscow’s election interference and Trump’s possible obstruction of justice.

Wednesday's public blowup between Trump and congressional Democrats came as House Democratic leaders face mounting pressure to begin impeachment proceedings against Trump, inflaming partisan tensions in Washington.