Final answer:
A nationalistic person is most likely to support building a wall between Mexico and the U.S. to protect national interests.
Step-by-step explanation:
The individual most likely to want to build a wall between Mexico and the U.S. would be a nationalistic person. Nationalistic individuals tend to prioritize their country's interests over global cooperation, often favoring policies that they believe will protect and strengthen their nation. They may view a wall as a means to control immigration and maintain national security.