Consequentialism is only a sin when the baby to be aborted does not affect the dogma of the goodness of nuking Hiroshima and Nagasaki or the chances of a Republican victory.
To be anti-abortion-in-most-cases is to hold a morally evil position. To be pro-life is to hold a morally good position.
If you can’t tell the difference between good and evil, then you shouldn’t tell Catholics how to vote in the general election.
This is one of the many reasons I no longer take my cues from the Thing that Used to be Conservatism anymore than from the Thing that Used to be Liberalism. The problem is, as Pewsitter demonstrates, lots of people think the Thing that Used to Be Conservatism is coterminous (and often corrective to) the Magisterium when it gets all wussy and liberal-sounding.