CAMDEN — The aftermath of the war in Iraq has become a problem for President Bush among South Carolina’s swing voters in Kershaw County. It has turned what once was believed to be an asset for re-election into a vulnerability, according to interviews with those voters. Especially chilling were government reports last week that 1,000 Americans had been killed in combat since the conflict began. “Young guys are getting killed over there for nothing,” said Wanda Blakeney, a 49-year-old cook. “It’s sickening,” said Peter Roland, a 52 year-old baker and owner of the Mulberry Market in Camden. The war clearly...