The doctrine of nullification was practiced to hold congressional power over states rights. who exercised this doctrine? only southern states, only states of new england, no states ever exercised this doctrine, both in north and south

The correct answer is:

Only Southern states

Explanation:

The doctrine of nullification was created under the concept that the Union between the states was formed as an agreement were states designated power to a federal government so every state had the right to void any law they saw as unconstitutional. To void a law three quarters votes of the other states were required.

South Carolina used the Doctrine of Nullification in 1832 to void a federal tariff they saw as unconstitutional, and President Andrew Jackson reacted with the threat of using military force to stop the rebellious act because this doctrine was never admitted in the United States Constitution.

i think iowa because you committed the crime there