nullifier

One that nullifies.

One who believes in nullification as a means by which US states may resist federal laws.

One who nullifies or makes void; one who maintains the right to nullify a contract by one of the parties.

In United States history, an adherent of the doctrine of nullification.

One who nullifies or makes void; one who maintains the right to nullify a contract by one of the parties.

One who, or that which, nullifies.

an official who can invalidate or nullify

an advocate of nullification; someone who believes that a state can resist federal laws