The phone lists get circulated everywhere, so you will be blocking them forever. You can stop particular callers, but since they are mostly from volunteers using their own phones, you might get called from hundreds of different people. That said, here’s the U.S. rules:

During an election season, it is likely there will be an increase in calls and texts from political campaigns. While campaign calls and texts are exempt from the National Do Not Call Registry requirements, the Telephone Consumer Protection Act (TCPA) contains specific rules they must follow.

In general, robocalls and robotexts to mobile phones require prior consent. Political robocalls to landlines are allowed without prior consent, but there are exceptions as detailed below. In addition, political robocalls made to residential landline phones without the prior consent of the called party are limited to no more than three calls within any consecutive 30-day period.

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Political Robotexts

Robotexts – text messages generated through autodialing – are also considered a type of call and must comply with the same rules as robocalls.

Political text messages sent to a mobile phone using an autodialer require the called party’s prior express consent. Messages sent manually can be sent without prior consent.

If you are receiving texts that you didn’t ask for, report the sender by forwarding the texts to 7726 (or “SPAM”).

Campaigns should also honor opt-out requests if you reply “STOP.”