(The Center Square) The Democratic governor of Arizona and Republican governor of Nevada signed a bipartisan letter warning against California Gov. Gavin Newsom’s gasoline refinery proposal they say could result in gasoline supply shortages and raise gasoline prices. “It is evident that increased regulatory burdens on refiners and forced supply shortages will result in higher costs for consumers in all of our states,” wrote Arizona Gov. Katie Hobbs and Nevada Gov. Joe Lombardo in their letter to Newsom. “With both of our states reliant on California pipelines for significant amounts of our fue…