If Texas signed a trade agreement with Mexico which established tariffs and importing conditions for goods made in Mexico,the U.S.Constitutional objection to Texas' actions would be based upon the:

A) principle of preemption.
B) doctrine of devolution.
C) principle of separation.
D) principle of supremacy.

Principle of Supremacy

The doctrine that European Union law takes precedence over national laws of member states.

Constitutional Objection

A challenge or opposition based on the belief that a law, policy, or action violates the constitution.

Trade Agreement

A contract between nations that outlines how they will work together to ensure mutual benefits in trade.