Did Congress make a law?
Nope.
So your statement is patently wrong.
The First Amendment applies to government taking away RIGHTS.
Rush and Hannity and the others still have a RIGHT to speak freely. They just don't have a many people paying them money for the privilege of advertising on their shows.
Please don't post such, it makes the Conservative movement look like we are ignorant of how the Founding Documents really work.
Members of Congress and the president have made statements to intimidate Rush and his advertisers.