Title: The U.S. President and constitutional limits
Headings: The American President

Content: 2. Executive power
"The executive Power shall be vested in" the President. ( Art. II, Sec.1)
What is "executive power"? Unfortunately, the Constitution does not give a real job description of the presidency, and does not define "executive power". In fact, the Constitution doesn't define any of its terms; that's one of the major difficulties in interpreting it. We know that many words and phrases did not mean quite the same to those who wrote the Constitution in 1787 as they mean to us today. ( And the Supreme Court can't agree to what extent we're bound by what was once meant, or are free to choose more modern meanings.) But, in general, the phrase "executive power" must mean â€“ as it does in the business world today â€“ authority necessary to execute policy or instruction from those who are established to formulate policy.