Strip Steve Bannon of his security clearance. He is no longer working on the National Security Council for the White House, and his continued access to sensitive information is a danger to the United States.
Why is this important?
Steve Bannon is the head of Breitbart news, which spews racist, anti-semitic, & xenophobic propaganda. As a self-described "Leninist," who wants "to destroy the state," he never should have been appointed to anything in the government, much less given any kind of security clearance.