AUSTIN, Texas (AP) -- Former Gov. Ann Richards said Wednesday she has cancer of the esophagus and will undergo treatment at the world-renowned M.D. Anderson Cancer Center in Houston. Richards, 72, went in for tests Monday and got the diagnosis Tuesday, said spokesman Bill Maddox. Maddox said the former governor is waiting to hear from M.D. Anderson how advanced the cancer is and what her chances are. "She's facing this challenge," Maddox said. Richards, a Democrat, was governor from 1991 to 1995, losing a re-election bid to George W. Bush. Since 2001, she has been an adviser at a public...