Rush Hudson Limbaugh III, born January 12, 1951, is an American radio host and conservative political commentator. Limbaugh is the host of The Rush Limbaugh Show, a nationally-syndicated talk-radio show that airs throughout the United States on Premiere Radio Networks.

Limbaugh has been credited with reviving AM radio in the United States, and was inducted into the Radio Hall of Fame in 1993. The National Review magazine, in a 1993 cover story, called him "The Leader of the Opposition" during the Clinton administration. He is a bestselling author, with two titles on the New York Times Best Seller list in the 1990s.

Limbaugh's radio show airs weekdays for three hours daily, beginning at 12 noon Eastern time in the U.S. It also is carried worldwide over the Armed Forces Radio Network, and in some markets is carried on FM stations.

Radio broadcasting shifted from AM to FM in the late '70s because of the opportunity to broadcast music in stereo in FM, with better range and musical fidelity. Limbaugh's show was first nationally syndicated in August 1988, in a later stage of AM's decline. Limbaugh's popularity paved the way for other conservative talk radio programming to become commonplace on the AM radio. As of 2006[update], Arbitron ratings indicated that The Rush Limbaugh Show had a minimum weekly audience of 13.5 million listeners, making it the largest radio talk show audience in the United States. In March 2006, WBAL in Baltimore, MD became the first radio ...