Got a call from this number a couple days ago (9/6/2016) at around 6 PM. Caller ID showed as "Opinion Poll 1-720-307-8410". No way in hell would I answer that! Call rolled thru to voice mail. They left no message. Calling the number back later gets you a recorded message identifying the company as "Elkhurst Communications". They provide an option to opt-out; but I wouldn't trust it. It's simpler and more reliable to just add their number to my phone's Call Block List. Done. Problem solved.
Called 9/25 @ 5:47 PM. Left no message. Don't believe it is a poll, and if I did, I'm fairly certain they would not want to hear what I might have to say. SCAM, political or otherwise.