I guess we'll just pretend that certain elements of the Catholic left didn't align themselves with partisan Democrats like Ted Kennedy following Roe to allow him to support abortion rights while claiming to be in accord with Catholic social teaching. It is established fact that certain Jesuits from Boston College caucused with Kennedy in Hyannis Port & equipped him with the earliest form of the "private conscience verus public duty" split that has done so much to undermine the essential integrity of Catholic social teaching that you rightly point to. Certainly this was no less an attempt to align Catholic social teaching with a partisan agenda than that which occurred in response to Bernardin. Indeed, I would argue it was the necessary precondition for that attempt. Ignoring this context makes it sound like you're really just upset that more bishops don't share your own politics as opposed to Weigel's.