More than three decades after A Prairie Home Companion first hit the air, host/writer/self-appointed Midwestern everyman Garrison Keillor has become one of the most beloved and reviled figures in American culture. “Keillor is the shock jock of wholesomeness… The mere sound of [his] voice—a breathy baritone that seems precision-engineered to narrate a documentary about glaciers—is enough to set off warfare between the generations.”