DEL MAR, Calif. -- Sovereignty (Into Mischief), the imposing 6-5 morning line favorite for Saturday's GI Breeders' Cup Classic at Del Mar, has spiked a fever and "there's a possibility that he won't make the race on Saturday," according to Hall of Fame trainer Bill Mott. "He had a slightly elevated temperature and that remained through the night," Mott said to a group of media assembled on the Del Mar backstretch during training hours Tuesday morning. "This morning at 5 a.m. and when we got here at 5:30 a.m., he...