For decades, you could walk into Maranatha Baptist Church in Plains, Georgia on some Sunday mornings and see hundreds of tourists from around the world crammed into the pews. And standing in front of them, asking with a wink if there were any visitors that morning, would be President Jimmy Carter — preparing to teach Sunday school, just like he had done for most of his adult life.Some who came to hear him speak were undoubtedly there because of what President Carter accomplished in his four years in the White House — the Camp David Accords he brokered that reshaped…