They would have to win both the Senate and the House and have their fair haired boy/girl reside in the White House to do it.
Even then, they'd have to have a veto proof Senate. Never happen...
I will say though, I'm not convinced the right side of the isle wouldn't love to silence some of the conservative talk show hosts from time to time.
Corporate America will eventually silence talk radio. It is in the way of globalization and blocks the corporation from accessing cheap illegal alien labor in the US.