Most don't get that many. OP is likely targeted in the systems. My guess is that he votes often in the primaries and has shown interest elsewhere, like by signing up for communications or donating to or volunteering for campaigns.
I just checked my spam and I've received four political texts in July.
I’d think that as well, except anything targeted at my number uses the wrong name when they include names. Sometimes male, and sometimes female; which is interesting as I’ve kept the same number for more than a couple decades.
I’m not upset about being called ‘he’, but I would ask you to continue your use of ‘OP’ instead of it. While I’m not offended, the default assumption of someone being a guy only makes it harder for women’s voices to be heard.
The politicians made sure to exempt themselves from all the consumer protection, anti-fraud laws. They live in bubbles where their own political agendas are too important for limitations.
But I suspect, because my brand new phone number gets a lot of political spam, that 1) a lot of people can't live with it and change their numbers to escape or 2) a lot of it is recycled burner-phones, previously used to launder donations to fit legal donation limits. But it's given me a personal rule to never make a donation from my real phone or allow my real phone to become associated with any political process.