<P> Nullification , in United States constitutional history , is a legal theory that a state has the right to nullify , or invalidate , any federal law which that state has deemed unconstitutional . The theory of nullification has never been legally upheld by federal courts . </P>
<P> Nullification , in United States constitutional history , is a legal theory that a state has the right to nullify , or invalidate , any federal law which that state has deemed unconstitutional . The theory of nullification has never been legally upheld by federal courts . </P>
who can decide whether a law is unconstitutional
who can decide whether a law is unconstitutional
state
state