SACRAMENTO - State Sen. Jim Battin, R-La Quinta, said Tuesday that he is being investigated by the state Fair Political Practices Commission in connection with donations to his campaign committees. In a statement, Battin said he was cooperating with commission officials. He blamed the inquiry on "bogus complaints" filed by a Democratic colleague. Sen. Mike Machado, D-Linden, was angry at GOP criticism of Machado's fund-raising practices during a tough re-election fight, Battin said. Machado withdrew the complaint last July, Battin said. But that didn't stop the commission's investigation. "I did not attempt to conceal the source of any campaign funds....