“Rush not only revived conservatism, he revived A.M. radio”
Reviving AM radio, definitely.
Reviving conservatism? No.
Conservatives managed to elect Ronald Reagan without anyone having ever heard of a Rush Limbaugh. The people who promoted conservatism and paved the way for Reagan’s election were writers. The only national radio voice would arguably have been Paul Harvey.
What Rush did was create an entertaining pop-conservative show that for years uncritically served the goals of Bush Republicans. And there was plenty in it that wasn’t conservative at all.