Does Coke promote Pepsi in your world?
Sorry, that doesn’t wash. Hannity, Limbaugh, and Levin all talk about and promote each other. Mainly because they are friends and probably because they all belong to the same syndicated group. Coulter, Limbaugh, Levin, Hannity, and Ingraham all promote and push the other’s books. Only Ingraham pushes a book by Beck. Beck is taking a lot of the stuff mentioned first by Levin and then by others and expanding on it - drawing diagrams, putting faces to names, etc.