Barack Obama rolls out a new campaign weapon this week: his half-sister, Maya Soetoro-Ng, who hits the campaign trail on Thursday. The 37-year-old Soetoro-Ng, a high-school teacher in Honolulu whose red hatchback is plastered with her brother's bumper stickers, says she always knew Barack was destined for great things. "My mom and I had a joke that he would become the first black president," she told NEWSWEEK. "He was so smart, but also wise beyond his years. He had so commanding a presence. He was like a little big man. We called him 'the little big man,' because in many ways he was an old man when he was a kid."