The Arizona Senate has reversed itself and approved a proposed ballot measure to declare that the state has sovereignty over the air, water and other natural resources within its boundaries.
The proposed constitutional amendment failed on its initial Senate vote but was approved Monday on a 16-14 vote.
It had already been approved by the House but now returns to that chamber to consider changes made by the Senate.
Republican Sen. Alvin Melvin of Tucson has said the proposal would position Arizona to fight alongside other states in West to take control of forests and other resources. He says federal regulation restricts economic development.
Democratic Sen. David Schapira of Tempe has called the proposal a waste of time. He says supporters should just propose that Arizona secede from the union.