House Democrats are weighing extraordinary steps to secure testimony from a whistleblower whose complaint prompted their impeachment inquiry, masking his identity to prevent President Trump’s congressional allies from exposing the individual, according to three officials familiar with the deliberations.

The steps under consideration include having the whistleblower testify from a remote location and obscuring the individual’s appearance and voice, these officials said.

The efforts reflect Democrats’ deepening distrust of their GOP colleagues, whom they see as fully invested in defending a president who has attacked the whistleblower’s credibility and demanded absolute loyalty from Republicans.

“There are lots of different protocols and procedures we’re looking into to find out what works and doesn’t work to protect the identity of the whistleblower,” said a person familiar with the talks. “That is paramount.”

At a meeting with the Finnish president on Oct. 2, President Trump said Intelligence Committee Chairman Adam B. Schiff should be looked at for "treason." (The Washington Post)

The officials spoke on the condition of anonymity to discuss the matter frankly.

Negotiations over the whistleblower’s testimony come as House Democrats are trying to unearth as much evidence as possible before they move toward impeachment. The whistleblower’s complaint centered on Trump’s July 25 phone call with Ukrainian President Volo­dymyr Zelensky in which Trump pressed the new leader to investigate former vice president Joe Biden, a 2020 Democratic presidential candidate, and his son Hunter.

On Tuesday, the House Intelligence Committee will question Gordon Sondland, the U.S. ambassador to the European Union. The whistleblower reported that Sondland met with Zelensky to give “advice” about how to “navigate” Trump’s demands, working behind the scenes to carry out the president’s wishes in a country that’s not a member of the European Union.

In text messages provided to Congress, Sondland insisted that Trump’s decision to withhold nearly $400 million in military aid to Ukraine was not a quid pro quo — as diplomat William B. “Bill” Taylor had said he feared.

Democrats on Monday subpoenaed Defense Secretary Mark T. Esper and Office of Management and Budget acting director Russell Vought for documents related to the withholding of U.S. military aid from Ukraine.

“The committees are investigating the extent to which President Trump jeopardized national security by pressing Ukraine to interfere with our 2020 election and by withholding military assistance provided by Congress to help Ukraine counter Russian aggression, as well as any efforts to cover up these matters,” lawmakers said in a letter.

Signing the letter were Intelligence Committee Chairman Adam B. Schiff (D-Calif.), Oversight Chairman Elijah E. Cummings (D-Md.) and Foreign Affairs Chairman Eliot L. Engel (D-N.Y.).

Trump told his acting chief of staff, Mick Mulvaney, to hold back the military aid for Ukraine shortly before his July call. Trump has repeatedly denied that there was a “quid pro quo” between the military assistance and the request to investigate the Bidens.

At the White House on Monday, Trump lashed out at Democrats over their impeachment inquiry.

“You can’t impeach a president for doing a great job. . . . This is a scam,” he said at an event on trade with Japan.

Trump and other administration officials have repeatedly rejected requests for information and testimony in the Democrats’ investigations. The State Department ignored a subpoena for documents Friday, and a lawyer for two associates of Trump’s personal attorney Rudolph W. Giuliani who worked on the Ukraine matter, Lev Parnas and Igor Fruman, rebuffed another request on Monday.

“Overly broad and unduly burdensome,” John Dowd, who is representing Parnas and Fruman, wrote to House investigators. “This, in combination with requiring immediate responses, leads me to the inescapable conclusion that the Democratic Committee members’ intent is to harass, intimidate and embarrass my clients.”

The highly unusual arrangement for the whistleblower’s testimony underscores the toxicity between Republicans and Democrats on the House Intelligence Committee, which was once considered among the most bipartisan but is now spearheading the divisive impeachment investigation. One individual familiar with the discussions said this is the first time the panel has had to take such extraordinary measures to protect a witness — including from their GOP colleagues.

In a further sign of the breakdown of comity, the committee majority restricted access to the visitor logbook after GOP staffers leaked names of individuals signing in for job interviews when the majority was hiring new staffers in early 2019, according to a committee aide who spoke on the condition of anonymity to freely describe the situation.

Of the whistleblower, Trump has said that he wants to meet his “accuser” and has warned of “Big Consequences.” He even alluded last month to the death penalty for people who gave information to the whistleblower, likening them to spies and outraging longtime whistleblower advocates who called his comments chilling.

“In addition, I want to meet not only my accuser, who presented SECOND & THIRD HAND INFORMATION, but also the person who illegally gave this information, which was largely incorrect, to the ‘Whistleblower,’ ” Trump later tweeted. “Was this person SPYING on the U.S. President? Big Consequences!” 

Andrew P. Bakaj, a lawyer representing the whistleblower, sent a letter to acting director of national intelligence Joseph Maguire expressing fears for his client’s safety. Bakaj also noted that “certain individuals” have issued a $50,000 “bounty” for “any information” relating to his client’s identity.

House Democratic committee chairmen, meanwhile, immediately cried foul and accused Trump of “witness intimidation” — even as some of Trump’s staunchest Capitol Hill allies also began pushing for the disclosure of the whistleblower’s identity. On Sunday, Senate Judiciary Committee Chairman Lindsey O. Graham (R-S.C.) said that if the House impeaches Trump, “I will make sure” the whistleblower faces public questioning. 

“If the whistleblower’s allegations are turned into an impeachment article, it’s imperative that the whistleblower be interviewed in public, under oath, and cross-examined,” Graham said on Fox News’s “Sunday Morning Futures.”

In the House, Democrats say that without the unusual precautions for the whistleblower, Republicans on the House Intelligence Committee could learn and then leak the name of the individual, who has agreed to answer questions before the intelligence committees in the House and Senate.

Democrats overseeing the logistics of the testimony for the House impeachment inquiry are leaning toward a staff-only session that would prevent lawmakers from attending and asking questions, according to officials familiar with the conversations. Aides have even considered having the whistleblower testify from a separate location via a video hookup in which the camera would obscure the whistleblower’s image and alter his voice, possibly with modification technology.

Two other possibilities include having the whistleblower sit behind a screen or partition or conducting audio-only testimony.

“Schiff does not want to burn his identity,” a senior congressional official said.

Details for the whistleblower’s testimony are still being worked out, the officials cautioned. Little can be finalized until security clearances for the whistleblower’s lawyers are resolved so they can begin more substantive discussions about logistics, they said. 

Mark Zaid, one of three lawyers for the whistleblower, said that as of Monday, two have their clearances; the third needs only to sign the paperwork. 

“It’s just a logistics issue,” Zaid said. “It will happen over the next couple of days.” 

The whistleblower’s legal team is also in discussions with the Senate Intelligence Committee about testifying, according to two people familiar with the talks. The Senate panel, headed by Sens. Richard Burr (R-N.C.) and Mark R. Warner (D-Va.), is known for a more bipartisan approach; its staffers are not pushing for the same extraordinary measures being discussed by the House, which is what the whistleblower’s lawyers want.

“As far as we are concerned, any meetings with the whistleblower and the intelligence oversight committees will have the same conditions from us for both Republicans and Democrats. We are not playing partisan games, and our primary concern is the protection of our client,” Zaid said.

The House and Senate committees are expected to meet separately with the whistleblower — both probably away from the Capitol.

The off-campus meetings probably will be in a secure room provided by the executive branch, according to officials. The meetings could take place “within the next couple of weeks,” but no date has been set, one official said. 

Should the whistleblower testify from another location, the House panel could ask Intelligence Community Inspector General Michael Atkinson to confirm the identity of the whistleblower. Atkinson, who adjudicated the whistleblower’s complaint in August, determined that the whistleblower’s allegations were credible and constituted an “urgent” concern to national security. 

Congressional aides have been discussing the possibility of a transcript from the testimony, but whether the whistleblower’s legal team agrees to that depends on whether the individual’s identity can be protected. The lawyers don’t want information shared that could identify the whistleblower. 

The legal team has been hired by a second witness, one who had firsthand knowledge of the events in the complaint. So far, there has been no discussion with lawmakers about that person speaking with Congress. That would require permission from the director of national intelligence, but that’s “pro forma” at this point, an official said.