Another interesting tidbit from the oral argument in Royal Camin USA v. Wullschleger concerned what weight the Court should give unanimity on a question among the lower courts of appeals. (In this case, the lower courts of appeals have treated the post-removal amendment of a complaint in one way, but there is an argument the relevant statutory requires a different result.)
In the exchange, Justice Kagan suggests she is not a fan of INS v. Chadha (the decision in which the Court held that a unicameral legislative veto is unconstitutional).
From the transcript: