This presumes that local law enforcement with the requisite authority to allow this, such as the county sheriff, has not assented to the Federal agents operatin

This presumes that local law enforcement with the requisite authority to allow this, such as the county sheriff, has not assented to the Federal agents operating in their jurisdiction. Many of the complaints are coming from people (like the Mayor of Portland) that have no meaningful authority over the operation of the Federal government in their jurisdiction. And the people that do have authority are quiet. It looks more like the left hand doesn't know what the right hand is doing, and the right hand doesn't need the left hand's permission to do it.