portion of an existing U.S. state or states so that the region might either join another state or create a new state. Proposals to secede from the Union and proposals to create states from either organized incorporated or unorganized U.S. territories are not included. Land cessions made by several individual states to the federal government in the 18th and the 19th centuries also are not listed. Arizona In February 2011, Tucson politicians and activists formed the group "Start our State," to advocate secession for Pima County and other southern counties to create a state called "Baja Arizona". The group wanted the Pima County Board of Supervisors to put the issue on the 2012 ballot, but it was rejected by the board due to lack of authority, so the group circulated petitions. Interest in secession grew when Republican governor Jan Brewer and her allies enacted Arizona SB 1070, regarding illegal immigration. Furthermore, the state had passed laws affecting Tucson elections and how the city bids for public works projects. California Colorado In the mid-1930s, the Walsenburg World-Independent proposed that Huerfano County secede from the state. This was a pet project of Sam T. Taylor, a sports editor, who went on to become a long-serving state senator, continuing to pursue the idea unsuccessfully. In 1973, nearby Costilla County had expressed interest in seceding from Colorado and joining New Mexico. On June 6, 2013, commissioners in Weld County announced a proposal to secede with seven other counties to form the state of North Colorado, citing concerns with state policy and recently enacted legislation relating to the region's main economic drivers, including agriculture and energy. The bid was motivated by a belief that the urban population centers of the State weren't concerned with the economic interests of more rural areas. The commissioners stated that they would hold public meetings to gather input before crafting a ballot initiative by August 1, and that the proposal had aroused preliminary interest from fellow commissioners in Morgan, Logan, Sedgwick, Phillips, Washington, Yuma and Kit Carson counties. Eleven counties were involved in the partition movement by election day, though Moffat County was looking into joining Wyoming rather than North Colorado. Voters rejected partition in six of the eleven counties, including Weld and Moffat, and supported it (without binding authority) in five. Florida Politicians in the South Florida metropolitan area have made proposals to split Florida into two states, North