Divided government is not only a political phenomenon, but also becomes one of the most salient issues in the study of politics. When two elections are held at the same time, whether divided government appears depends on how many voters split their votes. If voters prefer divided government to unified government, then they split their votes in order to make divided government possible. If split-ticket voting is a phenomenon instead of a mean, then divided government is just the result of that voters prefer different parties in elections held at the same time.