I called it back. Voice said "Campaign office. Please press 9 if you want to be added to our "Do Not Call List". I hit 9 and they repeated my cell number & said I had been added to their "Do Not Call List".
Hope this helps!
515-608-8070 keeps calling and I keep refusing to answer the phone. This number called my home no less than 3 times today. The FCC should be able to stop these harassing calls as I am a Senior Citizen with Heart Problems and find the calls very aggravating.