Who was in the meeting?
There were also news reports on Tuesday which hinted that the country in question was one in the Middle East and might be Jordan.
"We don't say what is classified, what it not classified", he said. "That's the problem with the Russians - they lie". He's openly questioned the competency of intelligence officials and challenged their high-confidence assessment that Russian Federation meddled in last year's presidential election to help him win.
The meeting itself was a personal request from Vladimir Putin. The meeting was on the president's public schedule but American press was not allowed in; images of the meeting were made available through Russian state media.
What did Trump reveal in the White House meeting?
According to the US official, Trump shared details with top Russian officials about an Islamic State terror threat related to the use of laptop computers on aircraft. "I have people brief me on great intel every day", just before revealing the intelligence.
When pressed on the detail from the original Post story that homeland security adviser Thomas Bossert had contacted the heads of the CIA and the National Security Agency following the Oval Office meeting with the Russians, McMaster said "I'm not sure" and suggested Bossert had done so due to an "overabundance of caution". This time around, the Post reported, the intelligence came from a U.S. ally that hadn't authorized Washington to share it, a development that could shatter essential trust for intelligence and counterterrorism cooperation. He insisted that Trump did not share information about "sources and methods" because he was not aware of the source of the intelligence at the time he discussed it with the Russians.
Israeli officials declined to say whether they were the source of the information.
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The White House's botched handling of Trump's firing last week of FBI Director James Comey, who was overseeing the bureau's Russian Federation probe, and the president's own volatile statements about his actions are also likely to raise questions among allies about the US leader's standing. "I was in the room, it didn't happen".
Dina Powell, deputy national security adviser, had said in a statement, "This story is false. Trump later said he did share information about "terrorism and airline flight safety" with Russian Federation".
National Security Advisor HR McMaster denied the president revealed "intelligence sources or methods", but acknowledged that Trump and Lavrov "reviewed a range of common threats to our two countries, including threats to civil aviation".
In an interview with Radio Sputnik, political scientist Dmitry Drobnitsky commented on the issue, saying that U.S. mainstream media would like to see Donald Trump as a person completely deprived of any opportunities.
Mr. Trump is expected to visit Israel as part of his first foreign trip as president. There's also some fatigue setting in on Capitol Hill.
Sen. Mike Lee, meanwhile, said the allegations would be "highly problematic if true" and called for a briefing from the administration.
"If this was a tactic or an operation ISIS was going to use, the first the thing that ISIS is going to do is deal with it from the standpoint that somebody in their organization leaked it to someone else who got it to the U.S.", Waurishuk said.