Listening to the crude, discursive monologues on Rush Limbaugh’s daily three-hour radio program, which I have had occasion to do for a living, is a test of endurance for a person with minimum standards of decency. It’s a bit like being blown out of an airlock into the vacuum of space without a spacesuit. You can hold out for only so long before your lungs rupture and air bubbles perforate your brain. You lose consciousness just as your saliva starts to boil.