FRANKFORT, Ky. (AP) —  Kentucky Gov. Steve Beshear is vowing he'll win re-election over two challengers, intent on becoming the second Democrat to win a U.S. gubernatorial race this year despite the ailing economy.Beshear is facing his chief rival in Republican state Senate president David Williams, as well as an independent challenger who has trailed both in the polls.Kentucky voters routinely choose Republicans in national races, yet Democrats have only lost two governor's races since 1950 in the state. But Williams is promising an upset, defying poll projections.Williams complains the state lost thousands of jobs under Beshear and he has sought to make President Barack Obama a central figure of the campaign.Beshear has endorsed Obama for re-election and insists Kentucky is emerging stronger than most states from a gloomy economy.