Call came in when I couldn't get to phone in time to answer. No message. My system identified caller as CONTACT OPN.

Call just came in, we do not answer callers that we do not know.  Caller ID said CONTACT OPN.  I called the number back and it rang a couple funny rings then "We're sorry all our lines are busy. Call back at a later time" then nothing, not even a disconnect noise.

I also received a call from 207-209-3403, and it seemed to be an opinion poll tracking who I voted for.  The caller ID said Contact Opn.  I participated in their automated survey which wanted to know demographic info and who I voted for.  The recorded msg claimed that it was sponsored by "Study America" which I cannot find any information about.  I fear they are a Republican front group.  Does anyone have more info?

I don't answer opinion survey calls, IT IS NONE OF THEIR BUSINESS, what my opinions are.

I've also received unwanted calls from the Republican National Committee and other Romney support groups , calling from the following numbers:
1-866-641-7189 (multiple times)
661-748-0240 (multiple times)
Here are more political calls received from groups that didn't leave a message:
1-000-000-0000 (multiple times)

I don't know how they got my number, which is unpublished.  I am a Democrat and also resent the lies that they are spewing out about our President.