- 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- I hesitate to reply “stop” because I don’t want them to know this is a live number (is my instinct here outdated/inapplicable?)
Yeah political messages aren’t covered under antispam laws, so definitely don’t send a stop message. You’ll immediately get messages from a bunch of other sources now that they have you.