I think if Rush wanted to, he could sue ESPN for forcing him out on the basis of his race. He could claim that he was discriminated against for not being a black commentator saying a white QB was overrated by the media for being white. Sure, he'd probably lose, but he might raise awareness of the free speech issues, as well as the ridiculousness of parsing Rush's words to fit a fair-minded guy into a racist hole.
Of course, Rush probably has too much class (and pride) to go that route. It would be fun to watch, though.
Exactly. Also, it may be the case of winning a battle but losing the war. This is a skirmish. Let's see how the war plays out.
In the end, we have the real power. If enough of us stop watching ESPN, that sends a message. But, how many conservatives put their football before their principles?