The Supreme Court can rule a law to be unconstitutional, but the Congress, with the States, can amend the Constitution.
All of these checks and balances, however, are inefficient. By forcing the various branches to be accountable to the others, no one branch can usurp enough power to become dominant.
The French Example In France, the President is elected for five year terms by the people to a powerful position.
The President can, and has, dissolve Parliament and call for new elections. Together, the President and Prime Minister head the executive branch.
But these appointments must be approved by the Senate.
The Congress can pass a law, but the President can veto it.The Constitutional Topics pages at the site are presented to delve deeper into topics than can be provided on the Glossary Page or in the FAQ pages. The concept of Separation of Powers is embodied in the Constitution in the 1st Article, in the 2nd Article, and in the 3rd Article.Another Topics Page, on The Government provides details about the make-up of the various branches and may also be of use. The Separation of Powers devised by the framers of the Constitution was designed to do one primary thing: to prevent the majority from ruling with an iron fist.By tradition, the monarch does not veto bills passed by the Parliament.And the de facto head of state, the Prime Minister, is a member of the Commons.However, sometimes the smaller differences between similar systems can be interesting and illustrative.It is left to the reader to conduct studies of more disparate systems.The following are the powers of the Executive: veto power over all bills; appointment of judges and other officials; makes treaties; ensures all laws are carried out; commander in chief of the military; pardon power.The checks can be found on the Checks and Balances Page.The lower house, the House of Commons, consists of MPs (Members of Parliament) elected from one of 646 electoral districts. The Speaker of the House of Commons, elected by the House, acts as the referee in debate between the majority and the minority.The MPs in the House of Commons sit for five years, or until the monarch (at the Prime Minister's behest) dissolves Parliament and calls for new elections. In Britain, the majority party in the House of Commons holds all of the power. The House of Lords holds little more than delaying powers.