(Palm Beach, FL) -- Longtime talk radio host Rush Limbaugh is dead. The 70-year-old passed away after a year-long battle with advanced lung cancer, a diagnosis he revealed was terminal just months ago. Limbaugh is widely considered one of the most influential media members of the past 50 years, using his far-reaching microphone to push conservative candidates and initiatives. Since achieving radio syndication stardom in the late 80's, he has grown into the most listened-to radio show in the U.S.