The whistleblower complaint reportedly involving a discussion between 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 and a foreign leader was based on more than one incident, said a Democratic lawmaker who attended the House Intelligence Committee's closed-door meeting Thursday with the intelligence community's inspector general.

Lawmakers said the inspector general, Michael Atkinson, declined to share incidents during the meeting.

Rep. Chris Stewart Christopher (Chris) Douglas StewartAtlanta Wendy's 911 call the night of Rayshard Brooks's death released Tyler Perry offers to pay for funeral of Rayshard Brooks Current, former NHL players form diversity coalition to fight intolerance in hockey MORE (R-Utah) also told The Hill that Atkinson did not talk about the contents of the whistleblower complaint during the private session with lawmakers.

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Atkinson was “very careful” about what he said, Stewart said.

Two people familiar with Atkinson's appearance first told The New York Times that Atkinson repeatedly declined to share details with lawmakers and that he would not confirm or deny anything about the substance of the complaint.

The Washington Post late Wednesday first reported that a whistleblower filed a complaint with Atkinson after Trump made a troubling "promise" to a foreign leader during an interaction.

It is not clear who the foreign leader was, or what Trump said. House Intelligence Chairman Adam Schiff Adam Bennett SchiffSchiff to subpoena top DHS official, alleges whistleblower deposition is being stonewalled Schiff claims DHS is blocking whistleblower's access to records before testimony GOP lawmakers distance themselves from Trump comments on transfer of power MORE (D-Calif.) also said they are not sure whether the press reports are true or not, but they do believe that "there is an effort to prevent this information from getting to Congress." Schiff signaled that they believe the White House may be involved, though he said Atkinson did not say either way if they were.

The complaint has become the focal point of a standoff between the House Intelligence Committee and the intelligence community, with acting director of national intelligence Joseph Maguire withholding details about the incident.

President Trump earlier Thursday dismissed the Post’s report as “another Fake News story” while defending his conduct while on calls with foreign leaders.

“Virtually anytime I speak on the phone to a foreign leader, I understand that there may be many people listening from various U.S. agencies, not to mention those from the other country itself. No problem!" the president tweeted.

"Knowing all of this, is anybody dumb enough to believe that I would say something inappropriate with a foreign leader while on such a potentially 'heavily populated' call," he continued. "I would only do what is right anyway, and only do good for the USA!"

Another Fake News story out there - It never ends! Virtually anytime I speak on the phone to a foreign leader, I understand that there may be many people listening from various U.S. agencies, not to mention those from the other country itself. No problem! — Donald J. Trump (@realDonaldTrump) September 19, 2019

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.) deferred to Schiff (D-Calif.) when asked about reports that Atkinson declined to share details.

"I obviously trust the judgment of our committee chair, Adam Schiff, and he's following this very closely with an expert eye in what the law is, what protections there are for whistleblowers and where does it cross a line of a conversation that the president may have — and that he may make for our nation — that the public should be aware of,” Pelosi told reporters.

Schiff said in a statement that Thursday’s appearance from Atkinson was scheduled as a “briefing on the handling of the whistleblower complaint,” not on its contents.

Maguire has agreed to testify in open session on Thursday, Sept. 26, according to the congressman.

--This breaking news report was last updated at 3:45 p.m.