South Dakota Republicans on Thursday repealed a historic anti-corruption law approved by voters in a statewide referendum on Election Day.The measure, which passed with more than 51% backing in November, would have created an independent ethics commission, limited lobbyist gifts to lawmakers, banned officials from joining lobbying firms for two years after leaving office and created so-called "Democracy vouchers" for registered voters to steer toward their preferred candidates.But state GOP lawmakers said they didn't think voters knew what they were doing.Gov. Dennis Daugaard, a Republican, signed the repeal bill on Thursday night. In a budget address delivered after the November referendum, he claimed the public had been "hoodwinked by scam artists who grossly misrepresented these proposed measures."