Siri, politics, ads, phone numbers and listening in.

My husband uses Siri assistant on his iPhone regularly. Like a couple times a day. I’ve used her to identify songs less than a dozen times. Ever. The fact he uses her so much means she’s listening for his voice to ask her a question. Listening to his voice.
With the current state of politics, we have had quite a few debates on which Democrat we want to be on the ballot in November. He is currently being vocal about Mike Bloomberg being on the ballot and thinking about voting for him. I’m for Pete but that’s beside the argument here.
He just got a text from the Bloomberg campaign. He didn’t know how they got his number. I think Siri told them.