The Democratic Party confirmed Alabama Atty. Gen. Charles Graddick as the winner of Tuesday’s gubernatorial primary runoff but an aide to his opponent, Lt. Gov. Bill Baxley, said he may challenge the results. The official party vote count gave Graddick 470,051 votes to Baxley’s 461,295 in the bitter campaign to succeed four-term Gov. George C. Wallace. Baxley may challenge the results because Republicans were allowed to cross party lines in the runoff and vote for Graddick, a former GOP party member who openly courted the Republican voters.