What was a long-lasting result of Henry Clay’s American system?

Who is the plaintiff in united states vs lopez

Which of the following is an example of the pull factor known as economic migration? a. better educational opportunities pulling people towards a new country b. mexican laborers entering the us to work in agricultural jobs c. joining family members that are already in a new country d. crop failures driving people away from their country i am unsure on this question, i was thinking b? but i could be wrong.

How is the president involved in the process of bills becoming laws?