Because the Republicans understand Marshal McLuhan's Law: "The medium IS the message."
The trick is that it's "officially" forbidden, but on the Internet. It will be found. It will be passed around. It will be seen by all those people who will ask "What's the fuss about?"
The Democrats lack an understanding of how to do this, which is why they went off prematurely with the Foley emails. So, instead of a subversive underground success, the Democrats have just made the GOP base vow to crush them.
http://www.lo-l.com/political/democomercial.mpg
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