They may have been engaged in some other, more important activity.
.
The cops and their bosses had to have known it was against some law, local, state or federal to block passage of traffic on a public road or highway.
The optics or the political ramifications must have made them wait around until private citizens had to risk a lot to act.
What a shameful system enabled by lazy people. Why have laws on the books if only Trump and Giuliani have to follow them?
They may have been engaged in some other, more important activity.
.