In the United States, government at the federal and state levels is based on the presidential or “separation of powers” system: The head of government, the president or governor, is elected directly by the voters and serves for a specific term. This means the president is not institutionally a member of Congress and might be of a different party than that which controls Congress. It also means the executive branch has its own separate electoral mandate, great independent power, and a wide latitude of freedom from legislative oversight.
The United Kingdom uses the parliamentary system: There is no clear division between the legislative and the executive – the latter is a subset of the former. In American terms, Parliament acts as an electoral college which chooses the prime minister and all cabinet secretaries, a process known as “forming a government”. (The British use the word “government” where Americans would say “administration”; where we would say "government, the British say “state” or “Crown”.) This means the p.m. – who must be a Member of Parliament in the first place, elected from one particular borough or constituency – is always the acknowledged leader of the majority party in Parliament, or of the senior party in a multi-party coalition. Elections to Parliament must be held at stated periods, but the prime minister can dissolve parliament and hold early elections at any time; and Parliament also can remove the p.m. at any time through a “vote of no confidence.”
Practically all of the world’s republics and constitutional monarchies, and the constituent states or provinces of federal systems, use one or the other of these systems. Some, like France, try to combine the two, with complicated power-sharing arrangements between the president and prime minister.
Which is better? What are the advantages of one system over the other? What do you think?