What evidence do you have that he was in favor of outlawing abortion? Because "he's a Catholic" is not it. There are whole Catholic organizations that want legal abortion.
What makes it a red herring? I don't think you know what a red herring is. He has nominated a judge to the Supreme Court and she got voted in. If she is anti-abortion, it will prove your point. I'm not sure how giving you the opportunity to prove your point makes the question a red herring.