This number continues to call.  We ask to leave a message and then they hang up.  I usually disconnect the line before the message comes on as they call so often.  Twice in the last hour just today.  I wondered who they were, so went on address search on the computer and see many people get this call.  I will continue to hang up.  What a pain.  We are on the no call list already, too.

many calls, but no one answered until today, a public opinion poll, asked 3 questions

no answer until today, public opinoin poll in WI for senate and president. not certain of pollster

They are who you said they were.  I told them I was voting for Jill Stein for President (Green Party) and writing in for Russ Feingold.  The survey taker told me that Feingod wasn;t running, so I said there was a write-in campaign and that I could see half a dozen "Draft Feingold for Senate" yard signs from my front porch.

It was all a lie, of course.

I like what you did.
They call, phone rings, answering machine picks it up, they hang up.  I check caller ID and get this:  "Madison (Wisconsin) 807-5993".  So I check online and find a list of complaints of exactly this, someone calls from this number & hangs up.  If you call it back you get a recorded message telling you to press one to be on the do not call list but then you have to give them your number.  I am already on the do not call list.  My number is private so not going to give it to anyone.
Also when I checked online it states this number belongs to "Level 3 Communications" which is a switch number.  (i.e., they call from a different number but this is the number left on your caller ID.)  Looked up "Level 3 Communications" and it's a (telephone) marketing business.