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.
If it is possible to answer this question, answer it for me (else, reply "unanswerable"): Which court is the only one able to determine constitutionality?
unanswerable