Rush Limbaugh

American radio host whose The Rush Limbaugh Show became the most listened-to radio program in American history — and who founded the modern conservative political talk radio format that shaped American political discourse for three decades.

Single-handedly created conservative talk radio as a commercial media format — his show's 20-million-listener peak audience sustained for three decades — and defined the rhetorical style (populist, confrontational, entertaining) that all subsequent conservative media has emulated.