How accurate are Gallup polls?

Related questions

1. Why do we use polls?
2. Do polls use cell phones?
3. What is a Gallup?
4. What are characteristics of a likely voter?
5. What are Gallup polls used for?
6. How accurate are political polls?
7. Does Gallup poll call cell phones?
8. What does the Gallup organization usually measure?
9. Was George Washington really the first president?
10. Are Gallup polls anonymous?

Tags

1. #elections
2. #gallup
3. #about
4. #prediction
5. #accurate
6. #polls
7. #evidence
8. #percentage
9. #points
10. #average
11. #provide
12. #within
13. #markets
14. #overwhelming
15. #dominated
16. #since
17. #final
18. #forecast