Facing a new and damaging attack on his jobs record a month before election day, Georgia GOP Senate candidate David Perdue and his allies have settled on a hard-knuckle strategy: accept the hit and strike back by talking about Obama. Perdue defended recently unearthed comments he made during a 2005 court case that he spent “most” of his career outsourcing, saying this week that he was “proud” of his work as a businessman and politician.