According to Prof. H.J. Laski there is no foreign institution which, "in any basic sense" the American Presidency may be compared. However, as the real executive heads of two countries the American President and the British Prime Minister may be contrasted in respect their functions and powers. Both the US President and the British Prime Minister occupies a unique position not only in their respective political systems
He is the Chief Executive and as such it is his duty to see that the laws and the treaties are enforced throughout country. The constitution of the USA is based upon the theory of the Separation of Powers. The executive and the legislative branches of the government are made independent of each other.
The powers and functions of` the Senate prove beyond any shadow of doubt that not only it is more powerful than the Lower House, but it is also the most powerful second chamber in the world. Even the Fathers of the US Constitution mentioned Senate first, and then the House of Representatives in the Article of the original Constitution.
The Supreme Court of United States of America played a vital role in the evolution and development of the American political system. It has played a double role. In the first place. It has acted and the guardian of the constitution and fundamental rights. In the second place, it permitted the constitution to develop with the march of time.
The House of Commons is the lower chamber of the British Parliament. Its strength is 652. All members of this chamber are elected directly. The tenure of the House of Commons is 5 years but it can be dissolved earlier by the Queen acting on the advice of the Prime Minister. The House of Representatives is the lower chamber of the American Congress. It consists of 438 members who are elected directly by the American voters.
The Supreme Court of the USA is the highest judicial tribunal in the federation. The constitution of America vests all the judicial powers of the federation in this court and other inferior courts to be established by the Congress. The number of judges of the Supreme Court has not been fixed by the constitution.
The government of the USA is of the Republican type. This implies that the head of State is a President. He is not only the head of State but also the Chief Executive. The constitution clearly lays down that all executive authority belongs to him. He is the head of the executive in name as well as in fact.
The American constitution has not produced a clear severance of the three organs of the government. To weaken the authority of the government further, the fathers of the constitution introduced Checks and Balances, so that one organ obstructs the other. They possibly apprehended that an organ of the government, left to it completely, might degenerate and misuse its powers, thus becoming tyrannical and oppressive.