The Constitution assigns the following powers to the President:
1-Commander in Chief of the Armed Forces:
The President of the United States of America is the head of the U.S. Military. As Commander in Chief, he can authorize the use of troops overseas without declaring war. To declare war officially, he must get the approval of the Congress.
2-Make treaties, with two-thirds consent of the Senate
3-Receive ambassadors and other public ministers from foreign countries
4-Appoint ambassadors, Supreme Court justices, federal judges, and any officials as provided for by the Congress, with the approval of the Senate
5-Give an annual State of the Union Address to Congress:
7-Convene Congress on extraordinary occasions
8-Adjourn Congress, in cases of a disagreement about adjournment
9-"Take care that the laws be faithfully executed"
10-Fill in administrative vacancies during Congressional recesses
11-Grant reprieves and pardons for offenses against the U.S.
Compromise is a vital aspect to a President's success in working with Congress and the President relies on the support of the American people to accomplish his goals.
The American people are the ultimate authority over the President, the Congress and the Senate.