California Gov. Gavin Newsom (D) appeared alongside Sen. Cory Booker (D-N.J.), Democratic National Committee Chair Ken Martin and Texas state Rep. Nicole Collier (D) on a call as they rallied their party behind California’s redistricting measure.

Obama reportedly said the California redistricting plan, which is being proposed in response to a Texas redistricting that could add five GOP seats in the U.S. House, would only be used if Texas Republicans follow through with the new congressional map.