During the last two decades, state attorneys general have emerged as successful pursuers of major fraud by corporations. However, their efforts now face an aggressive challenge in the U.S. Supreme Court by the nation’s business community.

In Mississippi v. AU Optronics Corp., the justices will decide whether so called “parens patriae” lawsuits filed by state attorneys general to recover money on behalf of their state citizens can be removed from state courts to federal courts under the Class Action Fairness Act (CAFA).