In the United States of America, we have a government that is a representative democracy. Our government has three branches and they are Executive Branch, Legislative Branch, and Judicial Branch. When the Constitution was written in 1787, it said all three branches must work together.
The Executive Branch was established by Article II of the Constitution. The Executive Branch is responsible for making sure the government follows the laws. At the National level, the President and Vice President are the leaders of the Executive Branch. The President is also Commander-in-Chief of the armed forces. The President also makes sure that the laws of the Legislative Branch are obeyed. The Governor is the leader at the state level and the Mayor is the leader at the local level. You have to be at least thirty-five years old to run for President and have lived in the United States of America for fourteen years.