Those who have criticized Rush for being in the tank for the Republican establishment (perhaps at times justified) should be mindful that the left considers him a primary target and are going to great lengths to remove him from the airwaves because of his clear and damaging (to them)conservative message.
They may succeed in removing themselves from the airwaves pretty much like Air America.
Among the Obama promoting businesses which have forfeited my patronage to name a few are:
CVS Caremark
Pepsico
General Electric
Time-Life
Hewlett-Packard
National Geographic