Senator Barack Obama took his presidential campaign to Chicago Sunday, where he addressed an agonizing issue that has been largely overlooked by the national media — the murder of dozens of the city's public school students since last September. Speaking to an overflow crowd of worshipers at the Vernon Park Church of God, Mr. Obama, a resident of Chicago, said: "I asked to come here because I wanted to talk with you about the spate of violence that's been robbing... (GunPolicy.org)