Republicans in the Iowa Senate approved a bill Tuesday sharply limiting early voting, with some arguing that changes were needed to ensure the integrity of the state’s election despite no evidence of fraud.

The bill, approved on a vote of 30-18 with only Republican support, would reduce the mail and in-person early voting period, tightly regulate how absentee ballots can be returned and require polls in all elections to close at 8 p.m., an hour earlier than currently for general elections.

Bill sponsor Sen. Roby Smith said it will create uniform election rules statewide.