It may just be Giuliani vs Clinton. McCain has some problems and Guiliani's pol numbers are strong. He has a real shot at becoming president right now. Are you going to develop it or try to sell it to one of the campaign organizations?
I would immediatly (today) contact the other runners campaign offices and offer it for sale for $5,000 obo and mention in the email that your email has also been sent to the other runners campaign offices and best offer will take it.
Maybe mid to high $XXXX. I am not sure. I have done computer consulting work for election campaigns and there is a lot of money involved while the campaign is active. A presidential campaign even more so. Fund raising on the Internet has become very important. Howard Dean demonstrated that in the last presidential election. I think your window of opportunity is very small though. You need ot contact them ASAP.