The new whistleblower could potentially blow a hole in the key GOP defense, some observers said.
He is facing questions from three congressional committees on a whistleblower's complaint that alleged Trump put pressure on Zelensky to investigate Biden with the threat of withholding aid to his country. Trump raised Biden in a conversation with the Ukrainian president in July and last week said "China should start an investigation into the Bidens".
House Democrats are considering "rare precautions" to protect the identity of the Ukraine whistleblower out of fear that Republican lawmakers will leak that individual's identity, the Washington Post reported on Monday afternoon.
Lawyers for the whistleblower expressed concern in a September 28 letter to the acting director of National Intelligence, Joseph Maguire, that their client's safety could be at risk after Trump suggested he was a spy who had committed treason.
It has been reported the original whistleblower only had second or third-hand information about the phone call. And like his hero Trump, Gaetz also cozies up to white nationalists.
Trump attacks Democrats, whistleblower over impeachment
Adam Schiff for his handling of the whistleblower complaint - and how he's conducting the Trump impeachment inquiry. Trump had repeatedly criticized the whistleblower, saying that he wanted to meet with him or her.
In his tweeted messages, he referred to both Schiff's characterization of his call and the whistleblower's approach to the House Intelligence Committee in his email attacking Pelosi.
According to Fox News, Atkinson revealed in testimony this week that the whistleblower volunteered his or her status as a registered Democrat and had a prior working relationship with a prominent Democratic politician.
There is no evidence of wrongdoing by Joe or Hunter Biden in Ukraine.
The also Trump-nominated Inspector General, Atkinson, wrote last month that the complainant was not a direct witness' to the phone call.
"They just need to know that even as they try to undermine our ability to find the facts around the president's effort to coerce a foreign leader to create dirt that he can use against a political opponent, that they will be strengthening the case on obstruction if they behave that way", Schiff said.
While the White House's notes of the call show the USA president made no direct mention of offering aid in exchange for Zelensky's assistance in investigating Biden, they confirm Trump brought up how the U.S. did "a lot for Ukraine" right before asking Zelensky to do him a "favor, though", by investigating Biden and discrediting the former special counsel Robert Mueller's Russian Federation investigation.