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at the very least it puts the media a bit on the defensive, called out for their obsequious nature and pandering to corporate interests and republican bullies.
not that it will necessarily change anything, but every bit helps. and with other works like david brock's book on the media and mccain, there may be a cumulative, qualitative difference in the coverage.
if successful, that will probably mean is an evenhanded idiocy applied to both parties' candidates. but that, sadly, would be an improvement.