I am pretty sure it's four. I looked it up, and I have a book I just looked through. Sorry if it's wrong! Have a good rest of 2016!
Mostly English political philosophy, like John Locke.
The Constitution explicitly assigns the president the power to sign or veto legislation, command the armed forces, ask for the written opinion of their Cabinet, convene or adjourn Congress, grant reprieves and pardons, and receive ambassadors.
