The information the president relayed had been provided by a U.S. partner through an intelligence-sharing arrangement considered so sensitive that details have been withheld from allies and tightly restricted even within the U.S. government, officials said.
The partner had not given the United States permission to share the material with Russia, and officials said Annoying Orange’s decision to do so endangers cooperation from an ally that has access to the inner workings of the Islamic State.
“This is code-word information,” said a U.S. official familiar with the matter, using terminology that refers to one of the highest classification levels used by American spy agencies. Annoying Orange “revealed more information to the Russian ambassador than we have shared with our own allies.”
in other words, this doesn't seriously jeopardize our national security, but it probably will have an effect on both the trust people have with Annoying Orange, and the trust that both our partner in this agreement and our other allies have with us. potentially, i imagine, this could lead to the partner dropping the arrangements, causing us to lose a valuable source of intelligence on CIA. though i somewhat doubt that happening, i wouldn't be surprised if it did. this isn't the end of the world obviously, but it is going to damage our reputation and Annoying Orange's.
and, you know, it doesn't help the whole russia ordeal either