The first part, who can be a president? First, the U.S. president must be native American born in the United States. Second, he must be at least 35 years old. Third, he has lived in the United States at least 14 years.Next, I will introduce the process of the election. The U.S. implement Presidential system, the presidential election was hold every four years. It includes five stages. Primary election、Nominating process、Running、General election 、Inauguration. Let's look it one by one.1. Primary election usually starts in Feb. and ends in June. It has two forms: indirect election system & direct election system. The first form, each county, strict, state host meeting to select electors. The second form, all voters cast ballots in the same day to select electors. Most states adopt the second form. purpose: To select electors for the National Party Conventions.2.Nominating process from July to Aug. The electors from each state make up the "Electoral College".The major political parties will officially hold its Presidential Nominating Conventions. In this Nominating Conventions, the "Electoral College" cast ballots for the candidates. Normally, the candidate for president receiving the majority(>50%) of the electoral votes is the elected president.3.Running. The candidates of the major parties will go to many states to win the supporters by means of: campaigning trips to different states, addressing TV speeches, showing on TV debates etc. The candidates deliver countless speeches and shake countless hands. The media tools play an important role in this process. From this picture, we can see this process costs a lot.4.General election: The first Tuesday after the first Monday in Nov. is called Presidential Election Day. That day, all voters cast ballots for the candidates. V oters can't determine the president directly. The first Monday after the second Wednesday is the real presidential election day. That day, the “Electoral College”represents the wishes of the voters to cast ballots for the candidate. Take California as an example, this state has 55 ballots, if more than a half voters support President Obama, then the electoral college will vote these 55 ballots to Obama. From this picture, we can see, there are 538 ballots altogether. Each state is allocated a number of Electoral College electors equal to the number of its Senators and Representatives in the U.S. Congress.5.The candidate who gets more than 270 ballots can be the president. In 2012, president Obama got 332 ballots.In Inauguration day, there are nine events, let 's look at together .1.Morning Worship ServiceThe tradition of attending a morning worship service on Inauguration Day began with Franklin D. Roosevelt in 1933.2.Procession to the CapitolBy tradition, the outgoing President accompanies the President-elect to the Capitol for the swearing-in ceremony.3.Vice President’s Swearing-In CeremonyUntil 1937, the Vice President was sworn into office in the Senate.4.President’s Swearing-In Ceremony5.Inaugural AddressSince George Washington in 1789, every President has delivered an Inaugural address.6.Departure of the Outgoing PresidentFollowing the inaugural ceremony on the west front of the U.S. Capitol, the outgoing President and First Lady leave the Capitol to begin their post-presidential lives.7.Inaugural LuncheonSince 1953, a luncheon was hosted at the U.S. Capitol for the new President, Vice President, and guests.8.Inaugural ParadeWhile early parades were mostly military escorts, by 1841, floats, citizens groups, and bands became standard.9.Inaugural BallThe first Inaugural ball in Washington was thrown for James and Dolley Madison in 1809.The final part is presidential oath. Firstly, I will introduce some details about the oath. Later, I will show you a short video about the oath of the president Obama.1.Presidents say their name after the first " I"2.Presidents raise their right hand and put their left hand on the bible while swearing in.3.The Chief Justice of the Supreme Court(最高法院首席法官) swears in the President of the United States.4.The swearing in ceremony was held in Washington, D.C.5.It is customary for presidents to add the words "So help me God " to the end of the oath .6.Presidents give an inaugural speech after their oath.。