Earlier in September, The New York Timesreported that White House advisers Cipollone and Eisenberg were aware of the whistle-blower complaint in August, yet there had been no information regarding how and when the U.S. president learned of it.
The probe is looking into whether Trump used the threat of withholding United States military aid to pressure Ukraine into investigating the Biden family.
The White House has declined to comment.
The August briefing with Trump was first reported by the New York Times.
'What is left to us now is to decide whether this behavior is compatible with the office of the Presidency, and whether the Constitutional process of impeachment is warranted'.
The transcripts released on Tuesday evening revealed that a lawyer for the White House's budget office resigned partly because of concerns overTrump's freeze on the military aid to Ukraine, according to a longtime career official from the office who had testified to Congress behind closed doors.
Sandy also testified that another unnamed official at the OMB resigned.
It is at this point that President Trump is entitled to attend the hearings with his counsel, an invitation House Judiciary Chairman Jerrold Nadler extended in a letter to Trump on Tuesday.
As the House Democrats move their impeachment inquiry against President Trump to the House Judiciary Committee, former White House Press Secretary Ari Fleischer said Wednesday that their efforts to convince observers that the president committed an impeachable offense failed and they are lacking "allies" and "bipartisanship". "But the new timing detail shows that he was also aware at the time that the whistleblower had accused him of wrongdoing in withholding the aid and in his broader campaign to pressure Ukraine's new president, Volodymyr Zelensky, to conduct investigations that could benefit Mr. Trump's re-election chances". "Trump only released the aid because he got caught".
Mark Sandy of the Office of Management and Budget (OMB) told the House of Representatives' impeachment inquiry that an individual in the office's legal division quit in part over issues with the suspension of security assistance to Ukraine, according to a transcript of his deposition released on Tuesday.
Trump promptly declassified what the White House claims is the full, unedited transcript of his telephone call with Zelensky, as he insisted there was nothing wrong in his dealings with Ukraine.