IRS illegally sent Karl Rove group's application to ProPublica

[Bill in NC]

501©4 organizations are not required to disclose donors.

So the IRS should never have asked for a donor list in the first place.

Lemon Drop wrote:
just a note - (we're all gonna be CPA's by the time this is done)

donations to 501c4's are not tax deductible, so the IRS would not be able to use donor's returns to determine where that money came from (not that they should be doing that anyway.)

http://www.irs.gov/Charities-&-Non-Profits/Other-Non-Profits/Donations-to-Section-501%28c%29%284%29-Organizations