Political, but not advocates for or against political candidates. Assuming that is possible.
- Findlaw: Why "Swift Boat Veterans for Truth" and Other "527" Organizations Can't Be Silenced.
- Cato Institute: Free Speech and the 527 Prohibition.
- Roll Call: National Section 527 Organizations Raise Over $133 Million.
- Lexology: FEC continues to apply controversial legal theories to regulate 527 organizations.
What are they again?
- Wikipedia: 527 Organization.
