"In terms of the specifics, I can't, I can't - I have no basis for comparison on what was shared with what country", McMaster said. But he suggested Trump did not intend to reveal classified information because he "did not even know where that information came from". "That's what he did", he added.
Israel's concerns about the Trump White House's handling of classified information were foreshadowed in the Israeli news media earlier this year.
"As President I wanted to share with Russian Federation (at an openly scheduled W.H. meeting) which I have the absolute right to do, facts pertaining to terrorism and airline flight safety", Trump said in two tweets. "Plus", he tweeted, "I want Russian Federation to greatly step up their fight against ISIS & terrorism". To know that this intelligence is shared with others, without our prior knowledge? But if Trump's actions put an informant at risk, a potential implication floated in USA media reports, it could make it harder for Western countries to recruit human sources.
"This is serious", a former official familiar with the information at issue told CBS News.
Democrats and Republicans on Capitol Hill criticized the president for compromising US national security. The ally reportedly hadn't given permission to share the intel. Code-word information is a terminology that refers to one of the highest classification levels used by American spy agencies, the daily reported.
The identification of the source would enable the Russians to identify the source and disrupt it. The president had been engaging in "routine sharing" with foreign leaders, he said, arguing that some of the information was publicly available.
News that Trump shared intelligence about Islamic State operations in the Middle East with Russian officlals sparked a new wave of criticism against Trump, some of it from his own Republican Party. The threat was related to the use of laptop computers on aircraft.More news: Police officer who shot and killed Texas teen is fired
McMaster repeatedly said that the information shared by the president to the Kremlin officials was "wholly appropriate given the objective of that conversation".
"The president in no way compromised sources and method of national security".
The national security adviser then went on to say that intelligence officials within the government bureaucracy appeared to have provided misleading information to the newspaper.
"This action is a threat to our national security, endangers diplomatic relations, and calls into question the administration's decision making", she said.
The classified information had been shared with the president by an ally, violating the confidentiality of an intelligence-sharing agreement with that country.
Along with potentially alienating a key US intelligence gathering partner, President Donald Trump may have directly put people in danger by disclosing classified information to Russian officials during a meeting last week.
Rep. Bill Pascrell Jr. acted Tuesday to force a House vote on whether to obtain President Donald Trump's tax returns, a move made following the dismissal of FBI Director James Comey and the possible dissemination of classified material to Russian officials.
The information, which concerned a plot regarding aviation security and the Islamic State, was cited as being from a "partner".