I imagine that they are JUST using the Federal Trade Commission's(FTC) DO NOT CALL Registry that we all signed up for as their cold call list to make calls. They do this because they know that the federal government is a lazy bunch of do-nothings that won't enforce jack. The whole thing is a joke.
Please realize that political calls do not fall under the DNC ( nor do some survey's or charity calls). What you need to do is tell them you do not want to receive their calls, and make sure you do a opt out with all the political parties. Then, if you receive calls, go that persons web site and under their contact us page, write them and tell them to place you on their internal dnc list !
The other thing that will help, if you have a cell phone, if it doesn't already have call blocking, there are free call blocking apps online you can get for some phones. If you have a land line, google call blocking devices. There are phones also available with call blocking but they do not hold as many numbers as devices do. Many of the devices run around 50.00 or less. If its a cell phone, some already have call blocking, if not, there are free apps on the web that will work for some. You can google this. If you have a smart phone, there is a free app called call control. Iphones appear to have apps also. Another one is called Mr. Number.
You can't tell them to quit. Not a live person and if you don't respond to the survey they keep calling back more and more. I filed criminal charges for harassment.