Rush Limbaugh is a Republican ( Conservative ) radio talk show host . Rush Hudson Limbaugh III ( ; born January 12 , 1951 ) is an American radio talk show host , conservative political commentator , and an opinion leader in conservative politics and conservatism in the United States . He hosts The Rush Limbaugh Show which is aired throughout the U.S. on Premiere Radio Networks and is the highest-rated talk-radio program in the United States .