When I saw "supes" in the headline I thought it meant superintendants, as in people in charge of a school system.
Here it means members of the county board of supervisors. If you live in a place where that's not a thing, it's very similar to a city council or county commissioners in many other US places.
Funny, I thought of superheroes, because they're called "supes" in The Boys. I was confused whether this was a joke announcing a new season of The Boys. I clicked the article just to clarify what supes meant lol
The City and County of San Francisco has a unique unitary government, where the citizens in my experience think of the supervisors as city supervisors, not county supervisors, even if both or either might be technically accurate.
Here it means members of the county board of supervisors. If you live in a place where that's not a thing, it's very similar to a city council or county commissioners in many other US places.