Progressive efforts to reform corrupt politics were often stymied by_________________.

A) the financial power of special-interest groups
B) the courts
C) a lack of support from anyone other than ethnic minorities
D) the refusal of organized labor to support them

Special-Interest Groups

Organizations formed to represent the concerns and aims of specific groups and interests in political and policy-making processes, often lobbying for favorable legislation and regulation.

Organized Labor

Groups of workers united in trade unions or similar organizations to protect their rights and advocate for better conditions and wages.