DENVER (AP) — States are free to legalize marijuana, Colorado argued Friday in a filing to the U.S. Supreme Court in response to a lawsuit from neighboring states that have asked the nation's highest court to shut down Colorado's pot law. "Nebraska and Oklahoma filed this case in an attempt to reach across their borders and selectively invalidate state laws with which they disagree," Colorado argued. Because federal drug law bans marijuana for any purpose, including medical, the federal government can't throw out recreational pot laws but not medical pot laws in effect in 23 states and Washington, D.C., Colorado argued. "Though federal law has long prohibited the manufacture, distribution, and use of certain drugs, states have always been on the front lines of making and enforcing drug policy, particularly as to marijuana," Washington and Oregon argued in their filing. "The only portion of the Colorado law Oklahoma is challenging is the section that transformed Colorado into a large-scale hub for the commercial growing and selling of marijuana because those actions created a tide of illegal drugs flowing into Oklahoma, Nebraska and other states," Cooper said.