For all of the promises candidates for governor make, all of the policy initiatives and bright ideas they and their campaign geniuses have devised, each one of them knows that there really is just one overriding issue in this race, one that effects every other. The state budget. They can devise ingenious plans for transportation, education, water and public safety, but without the money to pay the tab, they might as well promise to ban humidity, make the Chattahoochee flow backward and hand the Braves the World Series trophy.