ATLANTA — As Georgia's governor, Zell Miller successfully championed selling lottery tickets to fund scholarships in a Bible belt state and lost a fight to change the Confederate-themed state flag. As a U.S. senator, he enraged fellow Democrats with a primetime convention speech endorsing the re-election of President George W. Bush.Time and again, Miller proved himself a stubbornly independent Southern Democrat during a political career that spanned four decades. Miller died Friday at age 86 in northern Georgia, where he grew up in a mountain home built from rocks his widowed mother pulled from a stream."He had an independent streak that was governed by what he thought was right," said U.S. Sen. Johnny Isakson, a Georgia Republican who befriended Miller after a bitter political rivalry.