Differences- Effectiveness of interest groups in the protection of civil rights

Topic 1

Financial resources and lobbying power  

Uncapped independent expenditure (US) vs capped third party regulated spending (UK)

US 1

US interest groups generally have access to greater financial resources, enabling them to find high-profile media campaigns, lobbying efforts, and legal challenges.  
Example:  

Human Rights Campaign (HRC) in the US, the largest LGBTQ political lobbying organisation, has HRC PAC, raising money to support pro-equality candidates.

Possible because of Citizens United v FEC 2010 ruling permit uncapped independent expenditure

UK 1

In the UK, interest groups like Stonewall, liberty operate on more limited budgets and face tighter restrictions on political donations and campaign spending.  

Example:  

Electoral commission impose strict spending limit due to PPERA (political parties, elections and referendums act 2000), third party public expenditure cap

Difference 1

Structural theory: how much money rights groups can deploy is set by each system’s campaign finance design.

USA citizens united 2010 permit uncapped expenditures allowing rights based organisation to run on multi million budget lobby

UK third party expeditors capped, donation subjected to reporting thresholds, regulating financial influence

Topic 2

Impact of federal vs Unitary gov structure 

Parallel multi arena access for rights group (US) vs Westminster concentrated activity (UK)

US 2

US federal system provides interest groups with multiple levels of gov to influence, including federal, state, local gov 

Allowed civil rights groups to make progress even when federal action is stalled, such as state-level protections for LGBTQ+rights in states like California and New York have continued despite Trump’s federal rollback 2025, while’s pro life groups have advanced state level abortion bans such as state like Texas, following Dobbs v. Jackson (2022) 

UK 2

Conversely, the Uk’s devolved (quasi federal) system gives rights based interest group some sub national access via devolved legislature, most civil rights protections are determined at the national level with HRA 1998, Equality Act 2010 applying UK wide, producing more uniform rights protection.
Example:  

The UK Government blocked Scotland’s Gender Recognition Reform (Scotland) Bill in January 2023 using Section 35 of the Scotland Act 1998, citing conflicts with the UK-wide Equality Act 2010.

Difference 2

Structural theory appropriate because routes available to rights groups are set by whether the country operates under federal or devolved system.

This difference highlights that US interest groups benefit from a federal system that offers more entry points for influencing policy, whilst UK interest groups operate within a more centralised framework, limiting their avenues for change.  

Topic 3

Scope of influence on judicial decisions

Wide group access to the court (US) vs permission gated intervention (UK) 

US 3

In the US, interest groups often influence judicial decisions by filling amicus curiae briefs in significant cases.  
Example:  

Though ruled against Harvard, dozens were filed in Student for Fair Admissions v Harvard (2023) and was used as defence of diversity up until the final ruling. ACLU continue to use the route as a core tactic in influencing SC ruling.

UK 3

In contrast, the third-party intervention in court cases in UK are less common, and groups like liberty has limited means to directly influence court rulings compared to the US counterparts.  

Example: 
Major rights based interest group like Liberty and amnesty international provided legal expertise and information on R (AAA) SSHD (2023) on Rwanda case, influencing SC ruling of declaration of incompatibility with ECHR.

Difference 3

This is a cultural analysis examining how differing political and legal cultures shape the relationship between interest groups and the judiciary in the US and the UK. In the US, a more pluralist political culture has encouraged interest groups to develop institutionalised methods of influencing court decisions, particularly through amicus curiae briefs embedded within the judicial process. By contrast, the UK’s more restrained legal culture (rooted in culture prioritising parliamentary sovereignty) places greater emphasis on judicial independence and limited external influence, meaning third-party interventions require court permission and restrict which groups and perspectives can participate in cases.