The President of the United States of America

The President of the United States of America is the head of state of the United States.

Under the U.S. Constitution, the President is also the chief executive of the federal government and Commander-in-Chief of the armed forces. The United States was the first nation to create the office of President as the head of state in a modern republic. Today the office is widely emulated all over the world in nations with a presidential system of government.

The 43rd and current President of the United States is George W. Bush. His first term was 2001–2005; his second term began in 2005 and will end in 2009.

Requirements to hold office:
Section One of Article II of the U.S. Constitution establishes the requirements one must meet in order to become President. The President must be a natural-born citizen of the United States (or a citizen of the United States at the time the U.S. Constitution was adopted), be at least 35 years old, and have been a resident of the United States for 14 years.

Election:
Presidential elections are held every four years. Presidents are elected indirectly, through the Electoral College. The President and the Vice President are the only two nationally elected officials in the United States. (Legislators are elected on a state-by-state basis; other executive officers and judges are appointed.)

Originally, each elector voted for two people for President. The votes were tallied and the person receiving the greatest number of votes (provided that such a number was a majority of electors) became President, while the individual who was in second place became Vice President.

Amendment XII in 1804 changed the electoral process by directing the electors to use separate ballots to vote for the President and Vice President. To be elected, a candidate must receive a majority of electoral votes, or if no candidate receives a majority, the President and Vice President are chosen by the House of Representatives and Senate, respectively, as necessary.

How it works:
The modern Presidential election process begins with the primary elections, during which the major parties (currently the Democrats and the Republicans) each select a nominee to unite behind; the nominee in turn selects a running mate to join him on the ticket as the Vice Presidential candidate. The two major candidates then face off in the general election, usually participating in nationally televised debates before Election Day and campaigning across the country to explain their views and plans to the voters. Much of the modern electoral process is concerned with winning swing states, through frequent visits and mass media advertising drives.

For more information on this topic, please visit:
http://bensguide.gpo.gov/6-8/government/national/president.html
Source: USA.gov