I've been called by this number twice. The first time yesterday the answering machine had no message. Tonight I answered it and no one said anything. So this is another annoying GOP campaigning call. I'm not voting for Willard Romney or Barack Obama - in fact I'm not voting this year at all. They probably bother me because I was a Ron Paul supporter in the past. After the way the GOP treated Congressman Paul and his supporters in the caucuses, primaries, state delegate selections and at the convention, the party will never get my vote ever again.
Unsolicited robocalls to mobile phones are illegal. Groups (unofficially) supporting both sides are guilty of it at times, but that doesn't change how disruptive it can be it is.
Try working 3rd shift (with family/friends who know to only call in case of emergency from 7a-3p) and waking up to robocalls - it's a great reminder why they're illegal.