Back in December, the attorneys general for Nebraska and Oklahoma filed suit in federal court against the state of Colorado, claiming that the law making marijuana legal for adults there was causing problems for law enforcement in their states. Now, a group of prominent Oklahoma Republicans is urging their attorney general to drop the suit, according to the Washington Post: [caption id="attachment_8440" align="alignright" width="200"] AG Scott Pruitt[/caption] In a Wednesday letter to Oklahoma Attorney…