Which organization is an example of a public sector interest group?

The National League of Cities serves as an example of a public sector interest group because it specifically represents the interests of municipal governments and advocates for their needs at the national level. This organization focuses on the challenges and priorities faced by local government officials and seeks to influence public policies that affect city governance. By providing research, resources, and advocacy, the National League of Cities plays a crucial role in ensuring that the voices of local governments are heard in the policymaking process.

In contrast, the other organizations listed represent different sectors or interests. The American Medical Association (AMA) is primarily a professional association representing physicians and medical professionals, while Common Cause focuses on promoting campaign finance reform and government accountability, targeting broader electoral and advocacy issues rather than specifically public sector interests. Labor unions advocate for the rights and benefits of workers, representing the interests of employees but not exclusively focused on the public sector. Thus, the National League of Cities distinctly aligns with representing public sector interests.