[JURIST] Missouri Attorney General Chris Koster (D) [official profile] announced Thursday that he, along with 12 other state attorneys general, has filed an amici curiae brief [press release] before the US Supreme Court [official website; JURIST news archive] supporting an Arizona statute that imposes sanctions on employers that hire illegal immigrants [JURIST news archive]. In Chamber of Commerce v. Whiting [docket; JURIST report], the court will determine whether the Legal Arizona Workers Act (LAWA) [materials] is preempted by federal law….