The Doctrine of Preemption

The doctrine of preemption

A) proposes that governors may interpose their authority between the national government and the citizens of the state.
B) provides that federal law should take precedence over state actions only when one of the enumerated powers of Congress is involved.
C) excludes the states from acting on certain subjects when the national government has already acted.
D) permits the Supreme Court to override an action of the executive or legislative branch.
E) necessitates that the 14ᵗʰ Amendment only preempts federal action.