Every President is also the nation’s chief diplomat, the main architect of American foreign policy and the nation’s chief spokesman to the rest of the world.
In close concert with his or her role in foreign affairs, the Constitution also makes the President the commander in chief of the nation’s armed forces.
an expert in the circulation of goods and services
Some observers have suggested that modern Presidents must also be the nation's chief economist. That is, the President is expected to keep a close eye on the nation's economy and to take immediate and effective action when conditions dictate.
The chief executive has the power to issue executive orders, which are directives, rules, or regulations that have the effect of law. The power to issue these orders, the ordinance power, arises from two sources: the Constitution and acts of Congress.
...the nation’s chief executives have at times insisted that the Constitution gives the President the inherent power to refuse to disclose certain information to Congress or to the federal courts. That is, they have claimed the power of executive privilege.
The President’s power to grant reprieves and pardons is absolute, except in cases of impeachment, where they may never be granted. These powers of clemency (mercy or leniency) may be used only in cases involving federal offenses.
indirect veto of legislation by refusing to sign it
The fourth option, the pocket veto, can be used only at the end of a congressional session. If Congress adjourns within ten days (not counting Sundays) of sending a bill to the White House and the chief executive does not act on it, the measure dies.
the explicit and formal acknowledgement of a government
When the President receives the diplomatic representatives of another sovereign state, the President exercises the power of recognition. That is, the chief executive, acting for the United States, acknowledges the legal existence of that country and its government.