Fr. Drinan is a "devout Christian" as well, but I sure as heck wouldn't want him serving on the Supreme Court.
He is not a SOUTHERN, conservative Christian. Drinian is a spiteful, left winger, and a disgrace.
No, Father Drinan may be a devout Catholic, but that is certainly no guarantee that he is a Christian. He may or may not be (some RCC adherents are), but his 'devotion' to the RCC doesn't do it. A Christian is one with a personal relationship with Jesus Christ; commitments to ceremonial observances and/or human organizations have nothing -- absolutely nothing -- to do with it.
Same is true with Harriet Miers. Her affiliation with a Bible-oriented church makes it more likely that she is a Christian, but still no guarantee. But, assuming arguendo that she is, it makes all the difference. Ideas have consequences and we haven't had an evangelical Christian on the Court in at least half a century.
It is ironic that liberals are (so far) ignoring her (apparent) Christian commitment. Trust me, when it becomes apparent that she is a Christian, they will swing round on her with all the rage that heathens can mount.
I believe this is why this President feels confident in selecting her -- she is a sister in Christ and the Pres knows it.