NEW : Largest crowd yet in the race to '08 , said Obama campaign . NEW : Officials estimate Obama people attended event in S. Carolina . `` Oprah-bama '' hit Iowa on Saturday ; S. Carolina , Iowa on Saturday .
NEW : Largest crowd yet in the race to '08 , said Obama campaign . NEW : Officials estimate more than 30,000 people attended event in S. Carolina . `` Oprah-bama '' hit Iowa on Saturday ; South Carolina , New Hampshire on Sunday .