Question

Which of the following is not a duty of the US president?

a. Appoint justices to the Supreme Court.
b. Enforce and execute federal laws.
c. Propose a budget to Congress.
d. Determine the constitutionality of laws.

Answer 1

The US president does not determine the constitutionality of the laws: this is the task of the Supreme Court.

This has to do with the separation of powers: the president belongs to the executive branch so he has different tasks and the constitutionality of laws is checked by the judicial branch.