A common misperception is that the Supreme Court is the only court that may determine constitutionality; the power is exercised even by the inferior courts. But only Supreme Court decisions are binding across the nation. Decisions of a Court of Appeals, for instance, are binding only in the circuit over which the court has jurisdiction.

Answer this question, if possible (if impossible, reply "unanswerable"): Which courts' decisions, other than Supreme Court, are binding across the country?
unanswerable