The simple version:
But, pass it we did...Nullification of clearly unconstitutional laws is not as cut and dry as some statists around here try to suggest. If the federal government has no constitutional authority to do something, and we have to trust federal courts to "referee" them, and they surprise no one by failing to do so, then the state actions are not so illegitimate. As far as I'm concerned, those who attack this line of thought by trying to dismiss those who hold it as irresponsible or naive are part of the problem. The states are supposed to keep the federal government in check, and when we passed the disastrous 17th Amendment we invited problems like this.