94
Opinion of the Court
Capital Investments, Inc., 98 F. 3d 1133, 1139-1142 (CA9 1996), cert. denied sub nom. Shelton v. Barnes, 520 U. S. 1185 (1997); Smith v. Avino, 91 F. 3d 105, 108 (CA11 1996); Clow v. Department of Housing and Urban Development, 948 F. 2d 614, 616, n. 2 (CA9 1991); Cross-Sound Ferry Services, Inc. v. ICC, 934 F. 2d 327, 333 (CADC 1991); United States v. Parcel of Land, 928 F. 2d 1, 4 (CA1 1991); Browning-Ferris Industries v. Muszynski, 899 F. 2d 151, 154-159 (CA2 1990). The Ninth Circuit has denominated this practice—which it characterizes as "assuming" jurisdiction for the purpose of deciding the merits—the "doctrine of hypothetical jurisdiction." See, e. g., United States v. Troescher, 99 F. 3d 933, 934, n. 1 (1996).1
We decline to endorse such an approach because it carries the courts beyond the bounds of authorized judicial action and thus offends fundamental principles of separation of powers. This conclusion should come as no surprise, since it is reflected in a long and venerable line of our cases. "Without jurisdiction the court cannot proceed at all in any cause. Jurisdiction is power to declare the law, and when it ceases to exist, the only function remaining to the court is that of announcing the fact and dismissing the cause." Ex parte McCardle, 7 Wall. 506, 514 (1869). "On every writ of error or appeal, the first and fundamental question is that of jurisdiction, first, of this court, and then of the court from which the record comes. This question the court is bound to ask and answer for itself, even when not otherwise suggested, and without respect to the relation of the parties to it." Great Southern Fire Proof Hotel Co. v. Jones, supra, at 453. The requirement that jurisdiction be established as a threshold matter "spring[s] from the nature and limits of
1 Our disposition makes it appropriate to address the approach taken by this substantial body of Court of Appeals precedent. The fact that Justice Stevens' concurrence takes essentially the same approach makes his contention that this discussion is an "excursion," and "unnecessary to an explanation" of our decision, post, at 121, particularly puzzling.
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