(Radio Iowa) – The state law Governor Reynolds signed June 1st would let Republicans set new voter registration rules for the Iowa Caucuses — but Iowa G-O-P chairman Jeff Kaufmann says requiring Caucus-goers to have registered as a Republican voter weeks in advance is unlikely.

Kaufmann’s son, State Representative Bobby Kaufmann, is a senior advisor on Trump’s campaign and was lead sponsor of the bill that originally suggested Caucus-goers would have to be registered as a Republican — or a Democrat — at least 70 days before Caucus Night. That provision was removed before the bill became law. The Iowa G-O-P chairman says the party’s state central committee is discussing other ways to ensure the integrity of the Caucuses.

On Caucus Night in 2016, 21-thousand Democrats and independent voters switched their voter registrations to Republican that evening. Entrance polls suggested Trump won nearly a third of Caucus-goers who registered as Republicans that night. Kaufmann says there would be push back from caucus-goers if same-day registration wasn’t allowed — and some campaigns have already begun planning for it.

Kaufmann made his comments during an appearance on “Iowa Press” on Iowa P-B-S.