Ответ:
1) How many branches of power does the President control? Специальный вопрос
2) Who controls all three branches of power? Вопрос к подлежащему
3) The President controls аll three branches of power, doesn't he? Разделительный вопрос
4) Does the President control аll three branches of power or only one branch of power? Альтернативный вопрос
5) Does the President control аll three branches of power? Общий вопрос