SAN MIGUEL DE ALLENDE, Mexico (Reuters) - Normally a sleepy refuge for aging hippies and wealthy retirees, this cobblestone town in Mexico's mountainous heartland is abuzz with U.S. election fever as campaigners clamor for their votes. For the roughly 5,000 Americans living here, political get-togethers have disrupted a leisurely routine of sculpture classes and tennis, and pro- or anti-Bush badges are suddenly de rigueur as Democrats and Republicans fish for support from expatriates. "People are talking a lot about politics because of the terrible way the last election was decided," said New York-born Barbara Lichter, who has...