Does a ruling by the 9th us circuit Court of Appeals apply to every state in the union?

No, a ruling by the 9th U.S. Circuit Court of Appeals does not apply to every state in the union. Its jurisdiction is limited to the states within its circuit, which includes nine western states and two Pacific territories. However, its rulings can influence other circuits and may be referenced in cases outside its jurisdiction, but they are not binding. Only the Supreme Court can issue rulings that apply universally across all states.