Washington - Donald Trump says he was shocked by one thing he learned at a classified intelligence briefing — but he won’t say what it was.

The Republican presidential nominee said at Wednesday’s national security forum that he has learned that leading Democrats “did exactly the opposite” of what experts recommended in several instances. He said he did not learn anything, however, that changes the way he viewed his policies.

Presidential nominees in both parties get regular intelligence briefings to ensure they’re prepared to serve as commander in chief immediately if elected.