There's no doubt in my mind that the worst decision of the U.S. Supreme Court in recent memory is Citizen's United. It allows unknown people to more or less buy elections. Most Americans believe this.
Most likely the greatest amount of that spending will take place over the next few days. I suspect it will mainly lean Republican but can't say for sure.
Here's my suggestion: Stop every single bit of it and donate it to the Red Cross for victims of Huricane Sandy. It serves no useful purpose other than possibly having unknown people buy an election result. By now there has been plenty of advertising. And there is a real use for this money, helping all those who have been devastated.
The right and libertarians say government can't pay for everything. I understand the thought. It can't. But in times like these it can certainly do a whole lot. For the rest of what needs to be done I suggest that people who want government out of their lives put their money where their mouth is. Ask all SuperPACS to donate to the Red Cross.