Kudos to Rocco Palmo for linking to a story he did years ago about the different approaches to church leadership evidenced by Cardinals Burke and Wuerl. The money quote:
For bishops, "there are two different approaches'' to bring Catholic politicians in line with Church teaching. "One is the pastoral, teaching mode, and the other is the canonical approach'' – the legal approach, in other words.
He doesn't think it's a very close call: "I have yet to see where the canonical approach has changed anyone's heart.''