Like rats deserting a sinking ship, the Texas loyalists are bailing out on their lame-duck president more than a year before his second term comes to a merciful end. The latest Texan to desert President Bush is his good friend and top PR adviser Karen Hughes.Hughes followed former Attorney General Alberto Gonzalez, ex-White House Communications Director Dan Bartlett, former press secretaries Scott McLellan and Tony Snow and several other longtime friends and associates over the side of the president's sinking ship. It's going to be a long, cold winter for the Bush administration, and things won't get any better for …