The Archbishop is being consistent with his stance in the past. If it's not wrong to elect a pro-abort why would it be wrong to be one?
(from 2004)
"Pittsburgh Bishop Donald Wuerl has written on why the church considers abortion and related issues to be of paramount concern, but has stopped short of saying it is the only issue on which Catholics should base their vote.
"If you're voting for a candidate because they support abortion, that is in fact problematic," Rauscher said. "However, if you vote for a candidate who happens to support abortion, but your conscience moves you to vote for that candidate for other reasons, that falls into another category."
( Susan Rauscher, secretary for pastoral and social concerns for the Diocese of Pittsburgh)
I could draw an analogy (I hope it makes sense). If you bite of the fruit of Knowledge of good and evil in order to know evil. it is wrong. However if you partake of it because it's good for food, pleasing to the eye and desirable for gaining wisdom, well then that's OK.
Yet Archbishop Chaput gets a free pass. Go figure.