What are the most powerful Special Interests in the USA?

[Blue3]

What are the most powerful Special Interests in the USA?

Let's go with ranking the top 5-10.



For some examples:

Banks and other financial institutions
Pharmaceutical companies
Oil companies
Gas companies
Insurance companies
Agricultural companies (like Monsanto)
Electronics/Internet companies (like Google, Facebook, Apple, Microsoft)
Tobacco companies
Candy/Soda/FastFood companies
Military contractors & arms manufacturers
Automobile companies
Steel companies
Labor unions
Gay rights organizations
Environmentalist organizations
Media/newspaper/news organizations
Chamber of Commerce
National Rifle Association
AIPAC
etc.