There is- you can add filters that will route emails directly to spam based on the criteria you define

I agree, but I'm hard pressed to come up with the appropriate criteria at least in advance of getting any real life examples. At the moment, I can't think of anything better than 'republican|democrat' but I bet that will generate both false positives and false negatives.

That said, I doubt that I have to be concerned about it as I'm pretty unknown in political circles, other than having signed up for vote.org years ago.

I setup a filter to archive any email with the phrase "paid for by" this has been pretty good at filtering all political spam. Although it may generate some false positives.

> I'm hard pressed to come up with the appropriate criteria at least in advance of getting any real life examples

A wide filter would be “ActBlue” and “WinRed.” Otherwise, every jurisdiction has copypasta boilerplate in its political emails. Find yours and filter.

That's not one button. Google can provide the button.