Which is required of the President by the Constitution?

The Constitution establishes that the president has to "take care that the laws be faithfully executed."

Explanation:

This clause in the Constitution tries to encourage the United State's president to enforce the laws of his country, this is called the Take Care Clause.

The Constitution also gives the president the power to sign or veto legislation, as well as leading the armed forces and ask for a written opinion concerning his Cabinet.

to carry out all federal laws passed by Congress and signed into law