” The Washington Post first reported Monday that President Trump revealed information about an Islamic State plot that ‘had been provided by a U.S. partner through an intelligence-sharing arrangement’ during an Oval Office meeting with Russian officials. As a result, the U.S. relationship with the source of that information, a partner in the Middle East with knowledge of the terrorist group, could be at risk.”
Source: What Are the Risks of Sharing Foreign Intelligence? – The Atlantic