from an article:
One day after dismissing Comey, Trump welcomed Russian Foreign Minister Sergei Lavrov and Ambassador Sergey Kislyak — a key figure in earlier Russia controversies — into the Oval Office. It was during that meeting, officials said, that Trump went off script and began describing details of an Islamic State terrorist threat related to the use of laptop computers on aircraft.
For almost anyone in government, discussing such matters with an adversary would be illegal. As president, Trump has broad authority to declassify government secrets, making it unlikely that his disclosures broke the law.
“The president and the foreign minister reviewed common threats from terrorist organizations to include threats to aviation,” said H.R. McMaster, the national security adviser, who participated in the meeting. “At no time were any intelligence sources or methods discussed, and no military operations were disclosed that were not already known publicly.”
The CIA declined to comment, and the NSA did not respond to requests for comment.
But officials expressed concern about Trump’s handling of sensitive information as well as his grasp of the potential consequences. Exposure of an intelligence stream that has provided critical insight into the Islamic State, they said, could hinder the United States’ and its allies’ ability to detect future threats.
www.washingtonpost.com/world/national-security/trump-revealed-highly-classified-information-to-russian-foreign-minister-and-ambassador/2017/05/15/530c172a-3960-11e7-9e48-c4f199710b69_story.html?tid=a_breakingnews&utm_term=.36221cf1c3b2