LINCOLN, Neb. (AP) — Nebraska’s attorney general says he is disappointed but unsurprised by the U.S. Supreme Court’s rejection of Nebraska and Oklahoma’s effort to have Colorado’s pot legalization declared unconstitutional.

Doug Peterson noted Monday that the court ruled on procedures rather than merits of the case, and the states now have the option to file the case in federal district court.

Peterson says filing in district court would begin a more time-consuming process to reach the U.S. Supreme Court, and the attorneys general have not yet decided if they will do so.

Peterson says he is also discussing alternate strategies with other states to raise the complaint that recreational marijuana use runs afoul of federal anti-drug laws and negatively affects neighboring states.