One month after Cook County’s top prosecutor sued Facebook and political consulting firm Cambridge Analytica for alleged consumer fraud violations, the county has asked a federal judge to send the case back to state court.The case had been transferred to the courtroom of U.S. District Judge Robert M. Dow Jr. on April 12 after Facebook argued diversity jurisdiction applied because each of the parties exist in different physical locations.A U.S. District Court has jurisdiction to hear a civil case if the parties reside …