The White House is expected to give Congress the whistleblower complaint at the heart of a brewing scandal that has led to a formal House impeachment inquiry against 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, a source confirmed to The Hill on Tuesday.

Politico first reported that both the whistleblower complaint and Inspector General report will be released to Congress by the end of the week. The decision marks a reversal for the White House, which had previously declined to provide the documents to lawmakers, even as Trump decried the impeachment inquiry sparked by the controversy as a “witch hunt."

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The official emphasized to Politico that the decision and timing could change, but that the president has agreed to the move.

The White House declined to comment on the record about the matter.

Speaker Nancy Pelosi Nancy PelosiDemocratic senator to party: 'A little message discipline wouldn't kill us' Overnight Health Care: New wave of COVID-19 cases builds in US | Florida to lift all coronavirus restrictions on restaurants, bars | Trump stirs questions with 0 drug coupon plan Overnight Defense: Appeals court revives House lawsuit against military funding for border wall | Dems push for limits on transferring military gear to police | Lawmakers ask for IG probe into Pentagon's use of COVID-19 funds MORE (D-Calif.) on Tuesday announced the House would launch an official impeachment inquiry amid concerns that the president sought to pressure Ukrainian President Volodymyr Zelensky in a July talk to investigate former Vice President Joe Biden Joe BidenFormer Pence aide: White House staffers discussed Trump refusing to leave office Progressive group buys domain name of Trump's No. 1 Supreme Court pick Bloomberg rolls out M ad buy to boost Biden in Florida MORE and his son Hunter by threatening to withhold military aid.

Trump admitted this week that he mentioned Biden during the call and that he cut off aid to Ukraine days before the conversation. However, he has maintained that there was no quid pro quo discussed during their conversation.

Trump and Republican allies have claimed Biden abused his power during his time as vice president when he pressed Kiev to dismiss a prosecutor who was investigating a natural gas company owned by a Ukrainian oligarch, whose board members included Biden’s son. No evidence has emerged that Biden was acting to protect his son.

The president has already promised to release the official transcript of his phone call with Zelensky, saying it will reveal a “very friendly and totally appropriate call.” However, congressional Democrats say the transcript is insufficient and that the whistleblower complaint, which first expressed alarm over the phone call, is needed to fully flesh out the details of the discussion.