President Trump in an early morning tweet on Thursday accused The New York Times of lobbying for Democrats on tax reform, dubbing the newspaper a "pipe organ for the Democratic Party."

"The Failing @nytimes, the pipe organ for the Democrat Party, has become a virtual lobbyist for them with regard to our massive Tax Cut Bill. They are wrong so often that now I know we have a winner!" the president said in a tweet.

The Failing @nytimes, the pipe organ for the Democrat Party, has become a virtual lobbyist for them with regard to our massive Tax Cut Bill. They are wrong so often that now I know we have a winner! — Donald J. Trump (@realDonaldTrump) November 30, 2017

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The Times's editorial board on Wednesday urged readers to contact their senators to encourage them to vote against the Republican tax-reform bill.

The board used the @nytopinion Twitter account “to urge the Senate to reject a tax bill that hurts the middle class & the nation’s fiscal health.”

Trump said in another tweet on Thursday morning that the Times "has totally gone against the Social Media Guidelines that they installed to preserve some credibility after many of their biased reporters went Rogue!"

The Failing @nytimes has totally gone against the Social Media Guidelines that they installed to preserve some credibility after many of their biased reporters went Rogue! @foxandfriends — Donald J. Trump (@realDonaldTrump) November 30, 2017

The administration and Senate Republicans are looking to score their first legislative victory of the year with tax reform. The Senate on Wednesday voted to begin debate on the measure.

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The tweets mark Trump's latest Twitter attack on a news organization.

Trump called for a boycott of CNN on Wednesday after it was revealed the network would not be in attendance at the annual White House Christmas Party.