SINKING David Frum Survey USA poll today indicates that 44% of self-described conservatives have a "favorable" impression of Harriet Miers as opposed to only 12% who have an "unfavorable" impression. (45% don't have an opinion.) Good news for the White House? Not exactly. Two weeks ago, CNN/Gallup's poll showed 58% of self-identified conservatives describing the Miers nomination as "excellent" or "good." (29% thought it "fair" or "poor.") The CNN/Gallup poll already showed Miers 20 points less popular among conservatives than John Roberts had been. The CNN and Survey USA polls are not exactly comparable of course. But taken together, the...