President Trump Donald John TrumpFederal prosecutor speaks out, says Barr 'has brought shame' on Justice Dept. Former Pence aide: White House staffers discussed Trump refusing to leave office Progressive group buys domain name of Trump's No. 1 Supreme Court pick MORE retweeted dozens of posts from supporters, and himself, early Thursday morning ahead of the acting director of national intelligence's public testimony before Congress.

Tweets boosted to the president's nearly 65 million followers included several clips from Fox News programming, earlier posts from the president himself dismissing the impeachment inquiry launched by House Democrats on Tuesday and several tweets from close supporters and family members including Donald Trump Jr. Don John Trump'Tiger King' star Joe Exotic requests pardon from Trump: 'Be my hero please' Zaid Jilani discusses Trump's move to cancel racial sensitivity training at federal agencies Trump International Hotel in Vancouver closes permanently MORE and Vice President Pence.

For 2.5 years we were told there was collusion, then obstruction, then it was a cover-up... rinse and repeat.



Seems the media and their bosses at the DNC are just desperate to push something other than the results @realDonaldTrump is getting for America. https://t.co/rqljc02kSw — Donald Trump Jr. (@DonaldJTrumpJr) September 25, 2019

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House Democrats formally launched an impeachment inquiry Tuesday evening following reports that Trump asked Ukraine's president to investigate former Vice President Joe Biden and his son Hunter.

The White House released a partial transcript of the call on Wednesday, confirming the request from Trump and revealing that Trump encouraged Ukrainian President Volodymyr Zelensky to work with his personal attorney and the attorney general to investigate the unsubstantiated allegations of corruption on the part of the Bidens.

The whistleblower complaint that drove initial reporting on the call was released Thursday morning, detailing allegations related to the July 25 phone call and raising concerns about "efforts to restrict access to records related to the call."

Acting Director of National Intelligence Joseph Maguire was set to testify about the complaint before the House Intelligence Committee at 9 a.m.

Just as the hearing was scheduled to begin, Trump tweeted that Democrats were "trying to destroy the Republican Party and all that it stands for."

"Our country is at stake!" he added.