Earlier quoted context omitted.
With SMS, you can reply with STOP and it should take you off that list. Repeat for a few campaigns and hopefully you are done for that election cycle and get less/none in the next cycle.
Where I live, the political spam appears to be crowd sourced. Rarely is the same number used more than a couple of times. Most of it is of the form "Hi, this is Robyn from the Justice Democrats. Can we rely on your vote on Tuesday for candidate so-and-so?". Asking them to stop only stops that one person from spamming. As an aside, it's interesting to see the large difference in SMS campaigning between parties. I get…
> I get very little of it from Republicans but lots of it from Democrats.
Have you donated money to Republicans? How about Democrats? What are you registered as? What have you been registered as before?