Aug. 20, 2006, 12:37AM Strayhorn says her politics remain true But switching of parties, stands has critics calling her an opportunist By R.G. RATCLIFFE Copyright 2006 Houston Chronicle Austin Bureau AUSTIN — Comptroller Carole Keeton Strayhorn, an independent candidate for governor, has politically reinvented herself time and again during the past three decades — repeatedly leading to questions of whether her actions are sincere or expedient. Strayhorn is a Democrat-turned-Republican-turned-independent. She has given up three elected positions and one appointed state job to run for a higher office. And her positions on issues have transformed more than once. When she...