Trump's disclosures jeopardized a critical source of intelligence on the Islamic State, an information-sharing arrangement considered so sensitive that details have been withheld from allies and tightly restricted even within the U.S. government, according to the Washington Post report.

The Washington Post said the information was provided by a U.S. partner through an intelligence-sharing arrangement, but the partner did not give the U.S. permission to share the information with Russia.

Following the meeting, the White House contacted the CIA and National Security Agency to contain the damage, according to the Post.

However, the U.S. president has broad authority to declassify government secrets, making it unlikely that such disclosures broke the law, said the media reports.

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