14. Trade between states is called

COMERCE CLAUSE

Explanation: The U.S. Constitution, through the Commerce Clause, gives Congress exclusive power over trade activities between the states and with foreign countries. Trade within a state is regulated exclusively by the states themselves.

the doctrine of nullification recommended that states living inside the union have the one-sided, inalienable ideal to void any law made by the national government that could be esteemed illegal.

the united states was shaped based on a general agreement among its individual states. hence, it is inferred that under the hypothesis of invalidation, since the states are the establishment of the union, they have the ability to referee and disprove unlawful laws.