As a member of the county commission since 1993, Natacha Seijas (the former Mrs. Natacha Millan) has perfected a foolproof method of alienating people. She's mean. She's arrogant. She can throw a scowl that cracks granite. And so as she prepared to run for re-election in 2000, most political observers predicted her time was up. Her archenemy, Hialeah Mayor Raul Martinez, had made her defeat one of his top priorities. Her opponent in the commission race was Roberto Casas, a popular and affable member of the state Senate. Seijas's chances for survival were considered so slim that even some of her natural allies, such as Miami-Dade Mayor Alex Penelas and his stable of cronies, hedged their bets by financially supporting both candidates. But in this case the pundits were wrong. Seijas worked harder than Casas, knocking on doors and acting throughout the campaign as if she were twenty points behind in the polls. Simply put, Seijas wanted it more than Casas. And she concentrated on the right issues: responding to constituent concerns, introducing an ordinance to provide higher wages for employees of companies that do business with the county, and looking out for elderly residents. If a victory by an incumbent can ever be considered an upset, then Seijas pulled off an upset last fall, winning another four-year term. She's still mean. She's still arrogant. And she's still insufferable. But you've got to hand it to her: She fought a hell of a good race.