Former Sen. Adlai Stevenson III, who spent 11 years representing Illinois, died on Monday in his Chicago home Monday at age 90, a report said.
His son confirmed his death to The Chicago Sun-Times and said dementia was the cause of death.
“He just faded away,” Adlai Stevenson IV told the newspaper.
Stevenson, a member of a dynastic family in Illinois politics, spent 11 years in the Senate and unsuccessfully ran for governor of his home state twice.
The former senator was the son of former Gov. Adlai Stevenson II and great grandson of former Vice President Adlai Stevenson.
With Post wires