The mother of U.S. Sen. John McCain, whose feisty personality became her son’s secret weapon during his 2008 presidential campaign, has died. Roberta Wright McCain was 108.A spokesperson for her daughter-in-law Cindy McCain says Roberta McCain died Monday. A cause of death was not immediately released.She was 20 when she eloped with the man who would become the Arizona Republican senator’s father, marrying into a