I believe it may have something to do with the Senate Conservative fund. I voted to defund Obamacare and donated $25 and the calls and mailers started..
We all love conspiracy theories, but no. You might be being called by foreign, or domestic criminals faking their phone number. (1) Do not answer numbers you do not know (2) Do not call back numbers you do not know (Look them up first) (3) If you MUST take the call, hang up right away if it's someone you do not want to talk to.