President Trump Donald John TrumpBiden says voters should choose who nominates Supreme Court justice Trump, Biden will not shake hands at first debate due to COVID-19 Pelosi: Trump Supreme Court pick 'threatens' Affordable Care Act MORE on Wednesday lashed out at Speaker Nancy Pelosi Nancy PelosiPelosi: Trump Supreme Court pick 'threatens' Affordable Care Act Sunday shows preview: Lawmakers prepare for SCOTUS confirmation hearings before election Will Democrats attempt to pack the Supreme Court again? MORE (D-Calif.) in a pair of tweets Christmas night, decrying what he called a "Scam Impeachment."

"Why should Crazy Nancy Pelosi, just because she has a slight majority in the House, be allowed to Impeach the President of the United States?" wrote Trump, who is staying at his Mar-a-Lago resort in Palm Beach, Fla., for the holidays.

He also called the impeachment process "very unfair."

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Why should Crazy Nancy Pelosi, just because she has a slight majority in the House, be allowed to Impeach the President of the United States? Got ZERO Republican votes, there was no crime, the call with Ukraine was perfect, with “no pressure.” She said it must be “bipartisan... — Donald J. Trump (@realDonaldTrump) December 26, 2019

...& overwhelming,” but this Scam Impeachment was neither. Also, very unfair with no Due Process, proper representation, or witnesses. Now Pelosi is demanding everything the Republicans weren’t allowed to have in the House. Dems want to run majority Republican Senate. Hypocrites! — Donald J. Trump (@realDonaldTrump) December 26, 2019

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The tweets come a week after the House voted largely along party lines to impeach Trump. The two articles of impeachment accuse Trump of abuse of power and obstruction of Congress.

Pelosi has since indicated she will withhold the articles of impeachment until rules governing the trial are established by the Senate. Senate Majority Leader Mitch McConnell Addison (Mitch) Mitchell McConnellHawley warns Schumer to steer clear of Catholic-based criticisms of Barrett Senate GOP set to vote on Trump's Supreme Court pick before election Harris slams Trump's Supreme Court pick as an attempt to 'destroy the Affordable Care Act' MORE (R-Ky.), who has been meeting with the White House counsel to discuss an impeachment trial, recently said he was “not impartial about this at all."

Trump criticized Pelosi on Monday for not sending the articles to the Senate.

The Speaker defended her decision, arguing that she can't choose trial managers until she has a clear picture of how the Senate plans to proceed.

“The House cannot choose our impeachment managers until we know what sort of trial the Senate will conduct,” Pelosi wrote. “President Trump blocked his own witnesses and documents from the House, and from the American people, on phony complaints about the House process. What is his excuse now?”