Commander and Chief of the United States
Another title is: General Manager.
President of the United States of America.
Bill Clinton's title was the president! He was the 42nd President of the United States of America
President or POTUS
George Washington accepted this title. He did not want to be called "Your Highness" or anything that sounded like a king's title.
mr. president
Ninth President of the United States of America.
President of the United States of America
If you are addressing someone as the president then yes you do capitalize it.
Chief Executive of the United States
Barack Obama is the President and Commander-In-Chief of the United States of America.
yes you capitalize all titles no matter what it is rule #1