Any decision she makes is up for review by SCOTUS. One can say they believe in limiting government, but makes sure the reviewers are not as Constitutionally minded as she is. Some of her decisions will be overturned by SCOTUS, some may not. But with her on SCOTUS any decision she is involved in, if she is in the majority would not be overturned.
Yeah, I was awake for that civics class.
But that doesn't answer the question. Why move her to the federal Bench if Bush is quaking in his boots because of this constitutional crusader. He could have left her in California where her billiant decisions wouldn't need to be overturned by the Supreme AntiConstitutionalists.