1. Presidents of the United States

2. Under the U.S. Constitution, the President of the United States is the head of state and the head of government of the United States. As chief of the executive branch and head of the federal government as a whole, the presidency is the highest political office in the United States by influence and recognition. The president is also the Commander- in-Chief of the U.S. armed forces. The president is indirectly elected to a four-year term by an Electoral College (or by the House of Representatives should the Electoral College fail to award an absolute majority of votes to any person)

3. There have been forty-three people sworn into office, and forty-four presidencies, due to the fact that Grover Cleveland served two non-consecutive terms and is counted chronologically as both the twenty-second and the twenty-fourth president. Of the individuals elected as president, four died in office of natural causes (William Henry Harrison, Zachary Taylor, Warren G. Harding, and Franklin D. Roosevelt), one resigned (Richard Nixon), and four were assassinated (Abraham Lincoln, James A. Garfield, William McKinley, and John F. Kennedy).

4. George Washington George Washington (February 22, 1732– December 14, 1799) served as the first President of the United States from 1789 to 1797 and as the commander of the Continental Army in the American Revolutionary War from 1775 to 1783. Because of his significant role in the revolution and in the formation of the United States, he is often revered by Americans as the "Father of Our Country" Washington died in 1799. Henry Lee, delivering the funeral oration, declared Washington "first in war, first in peace, and first in the hearts of his countrymen". Historical scholars consistently rank him as one of the greatest United States presidents.

5. Abraham Lincoln Abraham Lincoln (February 12, 1809 – April 15, 1865) served as the 16th President of the United States from March 1861 until his assassination in April 1865. He successfully led his country through its greatest internal crisis, the American Civil War, preserving the Union and ending slavery.

6. Barack Obama The 44th and current President of the United States is Barack Obama (August 4, 1961). He assumed the office on January 20, 2009, and is the first African American president and the first president born outside the Contiguous United States, being born in Hawaii.