John V. Tunney, whose successful campaign for a California seat in the U.S. Senate became the basis for the 1972 Robert Redford film “The Candidate,” has died. He was 83. Tunney died of prostate cancer Friday at a home in the Brentwood section of Los Angeles, his brother, Jay Tunney, told The Associated Press. Tunney was among the youngest people elected to the U.S. Senate in the past century when he won his seat in 1970 at age 36. He then became one of the youngest in recent history to lose a Senate seat when he was defeated after just...