Buckeye Check Cashing v. Cardegna

In Buckeye Check Cashing, Inc. v. Cardegna, 546 U.S. 440, 126 S. Ct. 1204 (2006), the U.S. Supreme Court reversed the Florida Supreme Court by holding that when a contract has an arbitration clause under the Federal Arbitration Act, an argument that a contract containing an arbitration provision is void for illegality must also go to arbitration, not to a court:

"regardless of whether the challenge is brought in federal or state court, a challenge to the validity of the contract as a whole, and not specifically to the arbitration clause, must go to the arbitrator."

546 U.S. at 449.