The best defense is this: don't recognize the PN, don't answer and call back. DNC doesn't mean squat ... these people breaking the law, using robo systems will just confirm that your PN is good and as the man said before will re-sell share, etc. Don't bother with the gov't, any gov't - state or fed, they're too busy passing bogus laws so that we can someday fulfill Obamba's socialist agenda and we will be the new Soviet Union -- talk about stupid people.
Yes. That's because they think their high and mighty selves are more important than respect for YOUR home, telephone (which you, not they, pay for) and privacy. Factor that in when you decide who to vote for. You are supposed to be their boss and you should only vote for someone who gets that and puts their DO NOT CALL where their mouth is.
For starters, you should tell them that their campaign should screen all their phone lists against the Political Do Not Call List. That is if they robocall at all.