I am doing some research for a non-profit organization and have a
question that may be tough to answer.

How many Public Policy organizations are there in the U.S?

This includes 527 groups, PAC?s, and the various foundations (i.e. The
Heritage Foundation)

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Clarification of Question by presearch-ga on 24 Jan 2005 10:24 PST

After doing some research, I have found the # of PAC's.  Now, I am
looking for the # of 527 groups and foundations that looby to effect
public policy.  This includes groups like the NRA and various abortion
foundations (either pro-life of pro-choice).

Does your question apply to international aspects such as http://www.oaths.com