From NBC/NJ's Mike Memoli SPRINGFIELD, MO -- Obama returned to the campaign trail today, guns blazing. Responding to a barrage of attacks in recent weeks, he linked McCain to the Bush economic policies and claimed that it was the Republican nominee who was the “risky” choice in November. “Nobody thinks that Bush or McCain have a real answer for the challenges we face, so what they are going to try to do is make you scared of me,” he told more than a thousand people at a high ...