Are there any organizations that are actively working to decrease the affect of religion on American gov and society? (atheists, churches)

[phetaroi]

Are there any active organizations that work to decrease the affect or organized religion on American society and government? Although not limited to this, I was thinking of organizations working to eliminate tax breaks for churches.

If so, are any of you active in such organizations?

[Annilyna]

I'm an active member in my local chapter of FFRF and a member of National FFRF.

[TRANSPONDER]

American Atheists and Freedom from Religion foundation are the ones that seem to take out the cases that push back efforts to erode the the separation of church and state.

[siameseifyoupls]

So what benefit do you derive from being a member of FFRE?