1-Examine the powers, roles and limits of UK Prime Ministers and US Presidents

Paragraph 1: Legislative Power

Explanation:
The Senate has codified legislative power, including the ability to amend, delay, or reject legislation — equal to the House of Representatives (except revenue bills). It also has the power to filibuster and requires a supermajority to pass key legislation.
In contrast, the House of Lords can only delay most legislation by up to a year and cannot block money bills at all due to the Parliament Acts of 1911 and 1949.

UK Example (Lords):
The Lords can scrutinise legislation and suggest amendments (e.g., debates over Brexit legislation or the Illegal Migration Bill), but these can be overturned by the Commons.

US Example (Senate):
The Senate blocked many of Obama’s initiatives due to partisan deadlock, including the DREAM Act (despite House support). Biden’s 2023 veto of policing reform highlighted the Senate’s central legislative role.

Comparative Theory:
Structural theory – The codified, federal US Constitution grants the Senate entrenched powers, while the UK’s uncodified constitution allows the elected Commons to dominate over the Lords.

Paragraph 2: Appointment and Dismissal Power

Explanation:
The Senate has exclusive confirmation powers — all presidential nominations to the Supreme Court, cabinet, and federal positions require Senate approval. This grants it enormous influence over the executive and judiciary.
The Lords has no such powers; scrutiny of ministerial responsibility is done by select committees or public/media pressure, but the Lords cannot formally dismiss ministers.

UK Example (Ministerial Responsibility):
While ministers may resign under pressure (e.g., Suella Braverman 2022, Tulip Siddiq 2025, Gavin Williamson over bullying), these are political decisions. No institutional mechanism exists in the Lords to force resignation.

US Example (Senate):
The Senate confirmed Ketanji Brown Jackson (2022) and blocked Obama’s Merrick Garland nomination in 2016. Trump successfully nominated 3 SCOTUS justices, shifting the Court’s ideological balance — a direct use of Senate power.

Comparative Theory:
Rational theory – Senators individually act in the interest of their party/state; confirmation votes are key moments of influence. Peers in the Lords lack this power and are more advisory than decisive.

Paragraph 3: Foreign Policy and Executive Oversight

Explanation:
The Senate plays a formal constitutional role in foreign affairs — ratifying treaties (2/3 vote) and approving war funding. It can challenge executive action through hearings and committees. The Lords lacks such institutional clout and is mainly consultative.

UK Example (Lords):
Lords Dannatt (crossbencher) gave informed contributions to debates over UK involvement in Iraq and Syria, but these were advisory and non-binding.

US Example (Senate):
Obama’s 2010 New START treaty with Russia was ratified by the Senate in 2011. The War Powers Resolution constrains the president, requiring Senate input for long-term military actions (e.g., backlash to Trump’s Iran strikes in 2020).

Comparative Theory:
Individual theory – US Senators may act on conscience or state interest on foreign policy, particularly moderates. The Lords lacks any formal power in this area and acts on expertise rather than power.