I was responding to your scenario that a conservative nominee was rejected, followed by someone like Miers. Bush, it seems, wanted to nominate someone who would win, and who, having won, would vote with the other conservatives on the court, creating a reliable 5-4 majority to deal with future cases. You can disagree with him, but the logic is not as bad as those who are attacking Miers, and Bush, are suggesting with their insults and attacks.
At worst, we still end up with Miers, or someone who is, at the very least, marginally more capable-after a month or so of dithering, but with the Republican Party intact, if not stronger and more unified-and at best we end up with a Justice McConnell or Justice Williams.