What role does the average voter play in the presidential election?

All along, I thought presidential candidates get elected by popular vote. Now I realize that candidates are nominated by delegates who may choose to vote differently from the popular vote - making the average voter a glorified spectator. So, who are these delegates and how are they elected? Isn't this system contradictory to the whole democratic process? Whoever these delegates are, can't they be bribed and prepped by candidates? It seems to me that the more "connected" candidate will win an election rather than the most popular one.

Public Comments

1. If I remember correctly, John Kerry won the popular vote, but Bush got re-elected because of what you just said. Correct me if I am wrong.
2. Welcome to the American political system....FKED up ain't it? The antidote.....grassroots revolution. The people give the government power thru obedience, they simply have to stop being obedient and suddenly a lot can happen. Anyone remember what happened in the late 60s?
3. its like learning about Santa Claus isn't it..
4. The Government already knows who will be president look how Bush won corruption , vote fraud and the list goes on. But in my opinion No your vote don't make one damn bit of difference
5. Voting.