 No single conservative personality outside of modern-day Trump has had this kind of reach or influence. And unlike Fox News, which actively makes conservatives stupid, Limbaugh's method of misinformation has always been rooted in a more solid foundation of truthiness. A 2007 survey by Pew Research found that Limbaugh listeners demonstrated among the highest knowledge levels in response to a battery of political current affairs questions, with 79% having either a high or moderate level.