The newspaper cites current and former U.S. officials who say Trump jeopardized a critical source of intelligence on IS in his conversations with the Russian foreign minister and the Russian ambassador to the U.S. They say Trump offered details about an IS terror threat related to the use of laptop computers on aircraft.
Mr McMaster dismissed claims Mr Trump had relayed sensitive information to the Russians from a foreign intelligence agency - a move that allegedly put cooperation with a partner "that has access to the inner workings of Isis".
"This is code-word information", said a USA official familiar with the matter, using terminology that refers to one of the highest classification levels used by American spy agencies.
The White House counsel's office worked with the Army general on framing language, producing a clipped sound bite: "The story that came out tonight as reported is false". As the White House scrambled to mitigate the fallout from the report, which drew criticism from both sides of the aisle, National security adviser H.R. McMaster said on Tuesday that Trump's behavior at last week's meeting was "wholly appropriate".
National Security Adviser H.R. McMaster says no intelligence sources or methods were discussed and no military operations were disclosed that were not already known publicly. The president of the foreign minister reviewed a range of common threats to our two countries, including threats to civil aviation. Late Monday, reporters could hear senior aides shouting from behind closed doors as they discussed how to respond after Washington Post reporters informed them of an article they were writing that first reported the news about the president's divulging of intelligence.
Secretary of State Rex Tillerson says Trump discussed "the nature of specific threats" during the meeting, "but they did not discuss sources, methods or military operations". Going on the record should outweigh the anonymous sources. I was in the room. It didn't happen. Thanks, everybody.
Katy Tur: "McMaster Saying "Sources And Methods" Is A Red Herring." .
Lewandowski said Trump has an aggressive agenda, noting he is continuing to "do the peoples' business" and "change Washington".
The Washington Post reported Monday that Trump revealed highly classified information about Islamic State militants to Russian officials during a meeting last week.
ANDERSON COOPER (HOST): So Jim, explain how the White House is reacting.
"There are a number of people who the president is next to who are exceptionally loyal to him", he said.
JIM ACOSTA: That's right.
As they struggled to limit the fallout on Monday, Mr Spicer and other Trump aides made a decision to send Lt Gen HR McMaster, the national security adviser, to serve as a surrogate. Really tailoring his words to declare that this story is just not accurate.
Officials refused to answer specific questions, including what precisely the Washington Post report had got wrong, ensuring it would dominate a week that White House officials hoped would be quiet in advance of the President's first foreign trip. That denial was a non-denial denial.
CHRIS MATTHEWS (HOST): Let's go to Kristin Welker. The Washington Post asserted basically, they discussed, he discussed, gave away operational information about a coming terrorist plot. So there was that kind of information. Anyway, your thoughts, your reporting.