http://www.salon.com/2017/05/16/donald-trumps-loose-lips-with-russia-may-have-cost-america-the-trust-of-european-allies/
"The Associated Press reports that a senior European intelligence official believes his country might stop sharing sensitive information with the United States government if it is proved that Trump shared highly classified information with Russian Ambassador Sergey Kislyak and Russian Foreign Minister Sergei Lavrov. The source is reported to have told the Associated Press that Trump’s actions could demonstrate “a risk for our sources” if they confide in the United States in the future."