[Alex Murphy]

There is also the possibility that the majority of Latin Rite bishops in America take the Ecumenical Council proclaimed canon against bishops meddling in the affairs of other bishops’ dioceses more seriously than those few who will violate any canon to advance a political agenda.

I know nothing of such a canon, teaching or tradition (no surprise there, since I'm not Catholic), but if it does exist, and the bishops are self-consciously observing it, I can see that as a legitimate excuse for a bishop's silence. But I seriously doubt that all of the silent bishops are doing so out of obedience to the canon.

[Kolokotronis]

“But I seriously doubt that all of the silent bishops are doing so out of obedience to the canon.”

I expect you are right.