I say this over and over again: Certain terms and ideas are not capable of exclusive appropriation by one party as trademarks.  Keith Olbermann gives a stellar real-life example of my oft-repeated maxim in the context of what he sees as one party - here, the Republican party - attempting to appropriate for itself as its brand the tragedy of September 11, 2001. 

Kudos to Keith for his grasp of what a trademark is, and more importantly, for his insightful message.