Examples embrace the President of Germany , the Queen of the United Kingdom , and the President of Austria . The other essential mannequin is the presidential system, found within the United States and in Brazil. In presidential techniques, the chief acts as each head of state and head of government, and has energy to appoint an unelected cabinet. Under a presidential system, the chief branch is separate from the legislature to which it is not accountable. In the ‘decrease house’ politicians are elected to characterize smaller constituencies. The ‘higher house’ is usually elected to characterize states in a federal …