A comparative study of the UK and the USA (Option A): comparing the two constitutions, the legislatures (Parliament and Congress), the executives (Prime Minister and President), the judiciaries, and the wider political process of elections, parties and pressure groups.

What this dot point is asking

You need to compare the UK and the USA (Option A) across their constitutions, legislatures (Parliament and Congress), executives (Prime Minister and President), judiciaries, and wider political process (elections, parties and pressure groups). The CCEA A2 1 paper rewards explicit comparison (similarities and differences) and an understanding of how the different constitutional foundations shape each system.

Comparing the constitutions

The foundational difference is constitutional:

• The UK has an uncodified, unentrenched constitution based on parliamentary sovereignty and a fusion of the executive and legislature.
• The USA has a codified, entrenched constitution based on the separation of powers and checks and balances, hard to amend (requiring supermajorities in Congress and the states).

This single contrast drives the rest: the UK concentrates authority in a sovereign Parliament, while the USA disperses it among separate, mutually checking branches under a supreme written constitution.

Comparing the legislatures

Key comparative points:

• Power relative to the executive. A UK government with a majority usually controls Parliament; Congress can defy, block and investigate the President, especially under divided government.
• The upper chambers. The unelected, revising House of Lords (can only delay) contrasts with the elected, powerful Senate (equal in legislation, with exclusive powers over treaties and confirmations).
• Party discipline. UK parties are disciplined (the whips); US legislators are more independent, though party-line voting has risen with polarisation.

Comparing the executives

The executives embody the fusion-versus-separation contrast:

• The Prime Minister is the leader of the largest party in the Commons, fused with Parliament, dependent on its confidence, removable by the party at any time, and (with a majority) able to pass a programme easily but not separately elected.
• The President is separately elected through the Electoral College, is both head of state and head of government, heads a separate executive branch, serves a fixed four-year term, but must work with a Congress that may be controlled by the other party and that can block legislation and appointments.

The result is a paradox: the President has greater independent and international authority, but the Prime Minister can be more dominant over the legislature at home when commanding a disciplined majority.

Comparing the judiciaries

This is a direct consequence of the constitutional difference: an entrenched, codified constitution gives the US court supremacy over legislation, while parliamentary sovereignty limits the UK court.

Comparing the political process

The wider process also differs:

• Elections. The UK uses first-past-the-post for a parliamentary general election; the USA holds separate elections for the presidency (via the Electoral College), the House and the Senate, plus primaries to choose candidates.
• Parties. Both have two dominant parties, but UK parties are disciplined and programmatic, while US parties are looser coalitions (though increasingly polarised), and candidates depend heavily on personal funding and primaries.
• Pressure groups. Both have active pressure groups, but US groups are often better funded and more influential (through lobbying, campaign finance and the courts), partly because the separation of powers offers more access points.

Examples in context

A model A2 paragraph comparing the executives might read: "Comparing the Prime Minister and the President shows how the same label, head of the executive, conceals opposite logics. The President's power is independent: separately elected, serving a fixed term and commanding a distinct executive branch, the President does not depend on Congress to stay in office and carries unique authority in foreign and military affairs. The Prime Minister's power is dependent: it flows from leadership of the majority party in a sovereign Parliament, so a Prime Minister with a disciplined majority can drive legislation through far more easily than a President facing a hostile Congress, yet can also be removed by that party overnight. The judgement, therefore, is that the President has the greater independent and global authority while the Prime Minister can wield greater domestic command of the legislature, a difference that follows directly from separation of powers versus fusion." This compares explicitly and explains the cause.

Try this

Q1. State one key difference between the UK and US constitutions. [2 marks]

• Cue. The UK constitution is uncodified and based on parliamentary sovereignty; the US constitution is codified and entrenched, based on the separation of powers.

Q2. Explain why the US Supreme Court is more powerful than the UK Supreme Court. [6 marks]

• Cue. The codified, entrenched US constitution gives the court judicial review to strike down unconstitutional laws, whereas parliamentary sovereignty means the UK court cannot overturn primary legislation.

Q3. To what extent does the separation of powers make the US system less effective than the UK's? [24 marks]

• Cue. Weigh the checks, balances and protection from concentrated power against the gridlock and divided government they can produce, compared with the UK's efficient but executive-dominated fusion. Reach a substantiated judgement.