Obama’s comments appear in a new video supporting Gavin Newsom’s Proposition 50 which would allow the California legislature to draw new congressional boundaries ahead of the midterms

Barack Obama has entered the political fray ahead of November’s special election in California, accusing Republicans of attempting to “rig the next election” in a new ad backing Governor Gavin Newsom’s Proposition 50, a ballot measure that could reshape the state’s congressional map.

“Republicans want to steal enough seats in Congress to rig the next election and wield unchecked power for two more years,” Obama says in the 30-second ad, urging voters to approve the proposal. “You can stop Republicans in their tracks.”