Nathan Pippenger breaks down Rush's 15 million devotees:
80 percent of Limbaugh’s listeners identified themselves as "conservative," compared to 35 percent of the total U.S. population. About three-quarters of his listeners are NRA supporters, compared to 40 percent of all Americans. The same proportion identify themselves as Tea Partiers and Christian Conservatives. Why do they listen to Limbaugh? In one survey, 37 percent said they tune in for opinion, but another 28 percent say they enjoy the blend of news, opinion, and entertainment. Among Republicans, 13 percent say they tune in to Limbaugh "regularly." There’s one more interesting number to keep in mind, and after the events of [last] week, it will hardly come as a surprise: According to a 2009 survey, only 28 percent of Limbaugh’s audience is female—a smaller proportion than any other news source included in the questionnaire.