Can't imagine anybody in news industry will "out" their sources. I think this might be like the illegal immigrants thing where it will curtail itself because there will be a backbone when it comes to enforcement. Under Obama and predecessors leakers likely never feared for their jobs. Now they'll have to learn to hold it.
Fake News Liberal rags use 'anonymous sources', and it's gospel. A Conservative media sites one, and suddenly snowflakes claim it is 'fake news'. Given enough rope, snowflakes always hang themselves, exposing their hypocrisy, lies, and crimes...as we continue to see as they continue their Witch Hunt.