When will a state court rule on a federal claim?

The state court has had an opportunity to rule on the merits when the petitioner has fairly presented the claim to that court. The fair presentation requirement is met where the petitioner has described the operative facts and legal theory on which his claim is based. Picard, 404 U.S. at 277-78. Generally, it is "not enough that all the facts necessary to support the federal claim were before the state courts . . . or that a somewhat similar state-law claim was made." Anderson v. Harless, 459 U.S. 4, 6 (1982). Instead,