Iowa Secretary of State Matt Schultz’s push to uncover voter fraud has yet to lead to any criminal charges, but he says investigators still are looking into suspected instances of double-voting and non-citizens casting ballots. Schultz, a Republican serving his first term as the state’s top elections official, has made it his top priority to persuade lawmakers to pass a law requiring voters to show identification at the polls. He says doing so would prevent what he calls cheating. But critics, including the Democratic Party of Iowa, have said the state runs clean elections and the identification requirement would disenfranchise voters. Many local elections officials say fraud is not a problem. Against that backdrop, Schultz has promised in recent months that investigations by his office would prove his assertions. He told the Iowa Republican, an online news site, on Feb. 29: “We will be showing that there are cases of voter fraud in Iowa.” At a Republican Party dinner in May, he told activists he was “turning over every stone.” “I can tell you that, very soon, a clear message will be sent that you can’t cheat in Iowa. We are looking at our records,” he said. “I can tell you that we are coming on to something.” But records released by Schultz’s office last week, in response to a request from The Associated Press, show investigators could not find fraud in three cases involving voters whose qualifications were questioned after November’s elections.