Simplify the following text for a Grade 8 native English-speaking person.
Original: Reubin O'Donovan Askew ( born September 11 , 1928 ) is a retired American politician .
Simplified: Reubin O'Donovan Askew ( born September 11 , 1928 ) is an American politician , who served as the 37th Governor of the U.S. state of Florida from 1971 to 1979 .