Summary of Political Polls

This is another subject of interest to me, so I decided to do some research on this topic. This sparked me as an interest because I always wanted to know how newspapers and other media outlets got their statistics. They are used for election predictions and approval ratings.
A poll is only a prediction of an election outcome. Politicians study the polls as a part of their strategy.
When a poll is conducted only about 800-2000 people may be selected for the polls. There are several route of polling demographics, such as registered voters, by political party registration, and likely voters.

I will write more on this when I find more information, understand it more thoroughly, and when it is closer to election time.