Where an executive head elected for a specific period is not responsible to the legislature and can be removed only by impeachment or death such a government is known as ________________.
A presidential system is a system of government where a head of government is also head of state and leads an executive branch that is separate from the legislative branch. The United States, for instance, has a presidential system. The executive is elected and often titled president and is not responsible to the legislature, which cannot in normal circumstances dismiss it. The legislature may have the right in extreme cases to dismiss the executive, often through impeachment; however such dismissals are seen as so rare as not to contradict a central tenet of presidentialism, which in normal circumstances using normal means the legislature cannot dismiss the executive.