Grampa Dave has made a very good case for thinking that the Sierra Club and other radical ecological groups get a chunk of money from the Middle East, whose interest it is to stop drilling in ANWR, new refineries, etc.
I also would like to know WHO gave money to the Clinton library.
NPO's should not have the ability to hide their donor lists, period.
Are you saying that you would be first in line to tell the government about every dollar you drop in a Salvation Army kettle?
Shucks, would you want it splashed all over the news that all the people you pardoned are paying you off w/ contributions to your library? (/sarc)
Heck, some hicks who just fell off a turnip truck might accidentally make the connection that the donation was a quid pro quo (snicker).