If a president is running for their second term, they oftentimes win since to opposition is faced within that certain political party. Example: Barack Obama
If all candidates are new, a different process goes through called....
States select a day in which American citizens can vote for delegates
Primary Elections and Caucasus
***Note: Americans don't directly vote for presidents, but for candidates who later vote for presidential candidates***
Step two: NATIONAL CONVENTION
The selected delegates then vote for a single presidential candidate for a particular party At this time 2 candidates, each representing one political party, are elected
Step three: CAMPAIGN
Both candidates begin campaigning through debates, making speeches, and having a media appearance. They do so to attract the most amount of voters
This is why you should be a Republican....
But as a Democrat one can be able to...
Example: Maryland has 7 delegates. After citizens vote, 4 are Republicans and 3 are Democrat. Maryland as a whole then is in favor of the Republican candidate.
Step four: ELECTION DAY
Each state is given a number of delegates based on the population size and they are split according to Democrat or Republican. The state with the most amount then receives all votes. That state is then a complete vote for only one president.