By Camille Wheeler AMERICAN-STATESMAN STAFF Thursday, July 22, 2004 GEORGETOWN -- Eighty-three-year-old Alice Ainsworth keeps supporting her political party, even though Democratic names have almost disappeared from Williamson County ballots. "I'm a dyed-in-the-wool Yellow Dog Democrat from way back," the Georgetown resident said. "I just always vote for any Democrats on the ticket. "The last time, it seems it was hard to find any." With the Democratic National Convention set to unfold next week in Boston, the county's Democratic candidates aren't giving voters much to cheer about. Unlike decades past, when they dominated Williamson County's political stage, only four Democrats...