I called this number back- it is the Republican National Committee.
I received a hangup call from this number. I'm on the DO NOT CALL registry, but apparently, political calls get to ignore this. The hang up call I received from this organization is just one more reason why this party's ideology and the way it goes about disseminating its message (are hang up calls an effective way to do this) just a little more appalling.
And you think Dems don't make the same kind of calls? Can't tell you how many we've gotten. Only they are often very rude when they find out you disagree.