The boundless overreaching behind Congress' new Schiavo bill.
You can put aside the doctrine of federalism for Terri Schiavo, and the principles of separation of powers, and comity, and of deference to finality and the rule of law. But you'd want to be certain, on the day you do so, that you're sacrificing them for some concrete legal value that matters a whole lot more. Subordinating a centuries-old culture of law to an amorphous, legally meaningless "culture of life" is not a decision to be taken over a weekend.
Dahlia Lithwick writes about the courts and the law for Slate.