The United States Constitution says that a Presidential election is to be held once every fourth year, but the Presidential election process begins long before Election Day. At least one year before the election, candidates will begin raising money and campaigning for the Presidential nomination. The person each party nominates is the candidate who ultimately secures the most convention delegates based on voting in the state's primary election. Each party then announces their nominee for President at the party's national convention.
Presidential elections are held every four years, on the first Tuesday after the first Monday of November.
The Electoral College
The Electoral College is a group of citizens (known as electors) appointed by each state to cast votes for the President and Vice President of the United States on behalf of the state's citizens. It was created to ensure that each state had a role in selecting the President. When you cast your vote for President, you are actually telling the Presidential electors who are members of the Electoral College of your state to cast their votes for that candidate. In a Presidential election, the President is elected by the Electoral College, not the popular vote. However, your vote helps decide which candidate receives your state's electoral votes.
Each state gets the same number of electoral votes as it has members of Congress. There are a total of 538 votes in the Electoral College and a candidate must win a simple majority (270) of those votes to win the election. Pennsylvania has 20 electoral votes. Most states have a winner-take-all system, meaning that all of the state’s electoral votes are pledged to the person who won the state’s popular vote.