From PMBF Dan Froomkin's online chat today:
Alexandria, Va.: Dan:
I'm not sure I understand why the Republicans are in distress over the Harriet Miers nomination as it relates to whether she is an intellectual heavyweight. It seems they had no issues supporting Bush who was generally regarded as not being the sharpest knife in the drawer. What's really going on here?
Dan Froomkin: What an interesting way to look at it.
Granting you your outrageous premise just for argument's sake, I would say that they were confident that Bush would behave.