ults but also from the burden of defending themselves," thus allowing in- terlocutory appeals from denials of claims of immunity under that Clause. Helstoski v. Meanor, 442 U.S. 500, 508, 99 S.Ct. 2445, 61 L.Ed2d 80 (1979) (internal quota- tion marks omitted). Our case is not an interlocutory appeal, b