The presidential system of government allows the President to elect ministers from outside the Legislature. In this system, the President is separate from the legislature and is the head of the executive branch of government. The President is responsible for appointing ministers to assist in the administration of government. These ministers are usually experts in their respective fields and are not required to be members of the legislature. This is in contrast to a parliamentary system where the executive branch is made up of members of the legislature and the Prime Minister is usually the leader of the majority party or coalition in the legislature.