I don’t think that it’ll work either. They may eventually succeed in driving him to another venue but the only way they’ll get rid of him entirely is if “he” decides to call it quits.
Even if they contact local advertisers, those businesses are going to have to ask which they value more - the results they’ve had from advertizing on Rush, or the potential business of the Nags and New Castrati. If Liberals represent less than 20% of the population, I think it’ll be a pretty easy decision.