Colorado defends pot law, says other states free to legalize weed

Photo: Marijuana leaf (overused. please avoid this one) (file)
Researchers want to know whether medical marijuana is effective in controlling seizures in kids.

Legal weed in Colorado isn't hurting its neighboring states. That's according to a Supreme Court filing Friday that marks the first time Colorado has defended legalized marijuana in writing.

Colorado sent the argument to the nation's highest court as a defense against a lawsuit from Oklahoma and Nebraska, which have asked the court to stop pot regulation.