Trump Revealed Highly Classified Intelligence to Russia, in Break With Ally, Officials Say - The New York Times
WASHINGTON — President Trump boasted about highly classified intelligence in a meeting with the Russian foreign minister and ambassador last week, providing details that could expose the source of the information and the manner in which it was collected, a current and a former American government official said Monday.
The intelligence disclosed by Mr. Trump in a meeting with Sergey V. Lavrov, the Russian foreign minister, and Sergey I. Kislyak, the Russian ambassador to the United States, was about an Islamic State plot, according to the officials.