My father once accidentally auto-completed my phone number when he donated to a democrat. This led to over a decade of messages addressed to him from candidates from his state. Everyone time you ask to be removed, they remove it from their own list, not the list from which they cloned. I had to call so many people to find the office responsible for holding the canonical list of numbers which everyone was cloning. After talking with a few people there over multiple years, I finally got to someone that cared enough to remove me and not just hang up the phone. Political calls and texts are treated special under the law and aren't subject to most of the protections that the USA has over this sort of thing.

If you're going to donate to a political party or politician, do it anonymously.