Compare the Parliamentary And Presidential forms of government with reference with U.K. and U.S.A.

The parliamentary system of government is the system of government in the United Kingdom whereas the presidential system is the style of government in the United States.  In the presidential system, the president of the United States is elected by the people through the electoral college every four years.  In the parliamentary system, the prime minister is selected from the House of Commons and is normally the leader of the party that has the most seats in this house.  The manner in which the president is elected is established by the U.S. Constitution whereas the manner in which the prime minister is selected is established by tradition not through a written constitution or law.  

Because the prime minister is selected from the House of Commons and answers to that house, there is no separation of powers in the parliamentary system as there is in the presidential system.  Thus, the prime minister must maintain the confidence of the parliament which he represents and can be removed at any time with a vote of no confidence; a president, however, must be impeached in order to be removed from office.  In addition, the prime minister has the power to dissolve parliament, unlike the president of the United States who cannot dissolve Congress.  Furthermore, it is easier to have legislation passed in the parliamentary system than in the presidential system due to the fact that the prime minister is part of parliament and from the controlling party.  The U.S. president, on the other hand, can be from a party other than the one with the most congressional seats; this may result in the president being in opposition to many bills that are proposed in or passed in Congress.  Thus, many people consider the parliamentary system to be more efficient.