US Presidential Election explained

1. When does the next election take place?
2. Will there be the new president by the year 2016?
3. Who is expected to pick the candidates?
4. What process is called the primary election?
5. What famous people are there among the candidates?
6. What does " a caucus state" mean?
7. What animal is the symbol of the Democrats?
8. What animal is the enblem of the Republicans?
9. What is a convention?
10. What party does Hillary Clinton represent?