NEW : Spokesman says Obama `` does n't need lectures on special interests '' Sen. Obama accuses Sen. Barack CNN of caving to special interests . Clinton has challenged Obama 's ability to deliver on his rhetoric . Clinton supporter Hillary Clinton says she must win in Texas , Texas on 2006 .
NEW : Spokesman says Obama `` does n't need lectures on special interests '' Sen. Hillary Clinton accuses Sen. Barack Obama of caving to special interests . Clinton has challenged Obama 's ability to deliver on his rhetoric . Clinton supporter James Carville says she must win in Texas , Ohio on March 4 .