I checked around. This phone number is 'called' Tea Party Patriots. Apparently they don't have anything to do with the 'tea party'. The common characteristic among the call recipients is that someone in the household (or the address) might have voted for the Republicans (GOP) in one of the last 2 elections. So this number (group) is being used to harass these people till they get fed up with the Tea Party and stop supporting it.
I can't get more information to find out if this is a Democratic funded scammer or someone doing it on his own funds to try help the Democrats.
Remember the IRS!
Maybe, this is a variant on the same kind of harassment.
If it is really the Tea Party calling, they would wait to talk to you about their cause and ask for your support or at least, for a donation. This number just calls till you want to pull your hair out. No other intent behind it.
Not all of these calls are Telemarketing. (Telemarketing=Telephone sales of goods and services)
Politicals and many others are exempt from the DNC. I don't like that they are and I think they should be more regulated in accordance with those who don't want those calls, but that's the way it is......at least for now anyway. I am in the same boat as you as far as being on a very limited budget, so I share your concerns.
These people never give up! They are professional fundraisers. DO NOT answer the phone and DO NOT press ANY buttons. If you do, they will know that they have a real number and will continue to call.