- never signed up for anything like this,
- never donated to or signed up for emails from the DNC, et al.,
- political texts like this come all the time, and
- I hesitate to reply “stop” because I don’t want them to know this is a live number (is my instinct here outdated/inapplicable?)
Interesting to note, though another user pointed out that this does not work the same way in the United States (political organizations still have to provide a means to opt out).