The President of the United States is widely considered to be the most powerful person in the world. Since the ratification of the Constitution of the United States and the election of George ...

Not every president is listed since photography wasn't widely used during the United States' earlier history. The photos are shown in reverse chronological order — starting with current US ...

Since 1876, individuals have been identified with the title of President of the American Chemical Society. The position of President (a one-year term) has evolved in importance and complexity since ...