THat's a huge problem and why Hannity is the likely talk radio guy that at least some will go to for the counter from the left.
Once again he will never replace Rush but he does has the numbers requirement to help counter the hard left.
A lot of people find Hannity annoying. He has this tendency to be redundant repeating like-phrases over and over again. Even Lynda has criticized him for this. On top of that he already has a widely listened to show... you would just be bumping him down three hours on most stations.