Oрinion for the court filed by Circuit Judge STEPHEN F. WILLIAMS.
Plaintiffs Anthony LoBue and Thomas Ku-lekowskis are wanted by Canada to stand trial for crimes allegedly committed there. They brought suit in the district court for the District of Columbia challenging the constitutionality of the federal extradition statutes, 18 U.S.C. §§ 3184, 3186, and seeking declarа
*1082
tory relief and an injunction barring the United States from carrying out their extradition.
1
Citing the plenary discretion the law affords the Secretary of State to refuse to sign surrender warrants even after a judge or magistrate has found the evidence sufficient to justify surrender, the district court declared the law a violation of the constitutional separation of powers and issued the requested injunction.
Lobue v. Christopher,
Because the named plaintiffs are in the constructive custody of the U.S. Marshal for the Northern District of Illinois, they can challenge the statute through a petition for habeas corpus there. (In fact, they have filed a habeas petition.) Under established circuit law the District of Columbia district court therefore lacked subject matter jurisdiction to hear their declaratory judgment action. Accordingly, we vacate the district court’s judgment and rеmand for it to dismiss the case.
The government challenged plaintiffs’ suit on grounds of comity, since the plaintiffs had earlier filed a habeas petition raising the same issues in the Northern District of Illinois. But comity is not really the issue; the key to plaintiffs’ inability to pursue a suit here is jurisdictional, and it rests merely on the availability — not the actual seeking — of habeas relief elsewhere. We must, of course, examine not only our own jurisdiction but also that of the court below, regardless of whether the parties have neglected the issue, addressed it only obliquely, or even tried to waive it. See, e.g.,
Bender v. Williamsport Area Sch. Dist.,
In
Kaminer v. Clark,
While this suit is for a declaratory judgment, it is substantially similar to an application for a writ of habeas corpus, because, in addition to the claim of unconstitutionality, it complains that the appellant’s detention without a hearing is unlawful. Habe-as corpus wоuld lie only in the Southern District of New York, where the appellant was detained on Ellis Island at the time this suit was instituted. An action for declaratory judgment cannot be substituted for habeas corpus so as to give jurisdiction to a district other than that in which the applicant is confined or restrained.... The District Court properly dismissed the action, because it lacked jurisdiction.
Id.
at 52. For the principle that the declaratory judgment suit could not be substituted for habeas, the court in
Kaminer
relied on
Clark v. Memolo,
Of course plaintiffs’ focus is not explicitly on their present custody; indeed, in briefing on comity they claim that the naturе of the relief requested is different here since they have not formally sought a release from custody as in the habeas action. Brief of the Intervenor-Appellee at 4. But we have rejected precisely such efforts to manipulate the preclusive effeсt of habeas jurisdiction. In
Monk v. Secretary of the Navy,
A
post-Kaminer
case,
Hurley v. Reed,
The precise holding of
Kaminer
may have itself been overruled in
Shaughnessy v. Pedreiro,
There is, to be sure, the Fifth Circuit’s decision in
Wacker v. Bisson,
In
Chatman-Bey v. Thornburgh,
In fact, in addressing the government’s comity argument, the district court asserted an inferiority of the habeas remedy compared to declaratory relief, saying that a court in habeas “has no power to issue prospective relief’ because, even if the petition were granted, the government could simply bring another extradition proceeding against the erstwhile extraditees.
Lobue v. Christopher,
The intervenor (see note 1 above) pressed another purported difference between habeas and declaratory judgment relief, claiming that in a habeas case he “could not have maintained a class action ... nor sought class-wide relief in those proceedings.” Brief of Intervenor-Appellee at 3. If by that he meant to сlaim that there is no equivalent to class actions in habeas, he was wrong, for courts have in fact developed such equivalents. See
United States ex rel. Sero v. Preiser,
Accordingly, there is no basis for jurisdiction over plaintiffs’ declaratory judgment action. The judgment of the district court is vacated and the case remanded for the court to dismiss the ease.
So ordered.
Notes
. Mauricio Madero O’Brien, wanted by Mexicо, intervened. He later filed a motion indicating that he had waived all his defenses against extradition and had surrendered himself to authorities in Mexico. Madero's case is thus moot.
.
Hurley
was decided when the District of Columbia was the only place where a declaratory judgment aсtion could be brought. Once 28 U.S.C. § 1391 was amended to allow such suits outside of the District,
Young v. Director, U.S. Bureau of Prisons,
In view of Califano’s undermining of Hurley's premise, however, we do not rely on Young to establish that plaintiffs’ case is not properly brought here.
.
Pedreiro's
finding that declaratory relief was available as to deportation orders was itself largely extirpated by Congress. See 8 U.S.C. § 1105a (1994);
Agosto
v.
INS,
. The only discemable difference between the declaratory judgment action and the habeas petitions was in the defendants. Wacker named the Consul General of Canada as the defendant and real party in interest in his declaratory judgment action, rather than his jailer.
. Such issue preclusion wouldn't necessarily affect Canada’s rights as a party seeking an extradition, but, as plaintiffs did not name Canada in their declaratory judgment action, they evidently do not regard foreclosing Canada as having significant value. That view appears quite sound. Canada cannot extradite them without the affirmative assistance of the United States and its officers, and, although it might initiate proceedings looking to extradition (and even secure their detention to that end), under
Sunshine Anthracite
plaintiffs' hypothesized victory in the habeas action would bar federal officers from participating. A quest by Canada for extradition through a
state
court, as 18 U.S.C. § 3184 allows, would presumably not be barred by issue preclusion, but there is no reason it should be: plaintiffs’ own legal theory on the constitutional problem posed by the extradition law is based on the nature of Article III courts and does not draw the
*1085
state court procedure in question. See
Lobue,
