These folks call 2-3 times a day. I hang up. They won't take no for an answer even though I asked them not to call, to take our name off their list.; They are disturbing us constantly. I won't respond to any of their questions even if hell's freezing over.
As has been previously noted by others, it is Victory Processing, conducting surveys to gage public opinion. If you call the number back and select Option 7, it is supposed to remove your number "allowing a couple of days for processing the request. Unfortunately, having done that twice now, they continue to call.
Received calls multiple times from them. Just to note, when they ask you to press a number to be taken off their list, all that does is lets them know it's a working/good number. So they might keep on calling, or, share/sell your number to others letting them know it's a good number.