I didn't answer and they left no message. I called the number back and the recording identified themselves as the National Rifle Association. The recording offered an option #1 to learn more about the organization. I pressed #1 and was given the option to add my phone number to their do not call list, which I did. We'll see if it works.
Calls repeatedly and daily in spite of being up to date on the Do Not Call list. I.D. Comes up as NRA. Interesting that they don't respect the law or my right to privacy.