"I certainly want campaign finance reform. I just wish this would do it in a way that would stand up to a constitutional challenge"

This quote by Ben Nelson suggests that he favors project finance reform, however he is also aware of the legal implications of such reform. He is recommending that any reform needs to be carried out in a way that would have the ability to stand up to a constitutional difficulty. This suggests that he knows the legal complexities of campaign financing reform and is trying to find a method to make it happen without facing any legal issues. He is most likely recommending that any reform needs to be performed in a manner in which follows the Constitution and any existing laws. This quote reveals that Nelson is in favor of project financing reform, however he is also knowledgeable about the legal ramifications of such reform and is looking for a way to make it happen without running into any legal problems.