ATLANTA — Within hours of David Perdue's GOP Senate nomination, the real battle began with supporters of the new Republican nominee and Democrat Michelle Nunn launching attack ads in a general election matchup that will help settle control of the Senate. Democrats wasted no time launching their first attacks against the businessman who spent at least $3 million of his own money defeating veteran Rep. Jack Kingston Tuesday night. Hours later, the Democratic Senatorial Campaign Committee rolled out a 2½ minute online video that spliced together debate clips of Kingston and other Republican primary opponents attacking Perdue as an out-of-touch executive who enriched himself leading companies that lost U.S. jobs.