It's been more than four decades since Jimmy Carter campaigned across Georgia and asked voters to make him governor. His win set the stage for his election as president in 1976. Carter has just turned 90, but he was out campaigning on Sunday for his grandson Jason, a Democratic state senator and lawyer from Atlanta who's challenging the Republican governor, Nathan Deal, on November 4. The former president and his grandson spoke during a church service in south Georgia, a key area for Jason Carter as he looks to woo former Democrats back to a party that many left more than a decade ago. The visit to Mount Zion Baptist Church in Albany was part of a push ahead of early voting, which began overnight. Jimmy Carter spoke of the struggle for black people to get the right to vote and praised his grandson for fighting against the state's voter identification law. "He's led the charge," the former president said of his grandson's work in the courtroom to challenge the state law. "Everyone here and everyone you can contact should join with Jason when the time comes this year to make Martin Luther King's dream come true." Republicans who have pushed the legislation obliging voters to show a photo ID at the polls say the requirement will reduce fraud, but Democrats insist that such fraud is extremely rare and that Republicans are trying to reduce Democratic turnout. Young people and minorities who tend to vote Democrat often lack the photo IDs. Polls suggest a tight race between Carter and Deal, and Democrats see both the governor's race and a fierce battle for the state's open Senate seat as critical to laying the foundation for Georgia to become a presidential swing state in 2016. Jason Carter talked about how his grandfather had inspired him. "He didn't have a lot in his life. But if one child in rural Georgia can grow up to do the things he has done, then we owe it to every child to educate them and give them opportunity." Republicans have been eager to link Jason to the elder Carter's policies, portraying him as a liberal Atlanta Democrat who can't be trusted not to raise taxes. "I respect President Carter, and if I were a grandfather I'd probably want to support my grandson too," Deal said. "But we are not a state nor a nation in which titles such as governor are inherited by virtue of your legacy."