In Iselin v. La Coste, 147 F.2d 791 (5th Cir. 1945), the court held that one who admitted the existence of Subject Matter Jurisdiction in a first litigation would not be heard to contend in a subsequent collateral litigation between the same parties that jurisdiction had been lacking.
28 U.S.C. § 1331 Cited 100,930 times 140 Legal Analyses
Finding that in order to invoke federal question jurisdiction, a plaintiff's claims must arise "under the Constitution, laws, or treaties of the United States."
8 U.S.C. § 1226 Cited 3,236 times 22 Legal Analyses
Ruling that no court may set aside an immigration judge's "discretionary judgment any action or decision . . . regarding the detention or release of any alien or the grant, revocation, or denial of bond or parole"
8 C.F.R. § 1236.1 Cited 179 times 1 Legal Analyses
Authorizing parole where the alien has demonstrated that "such release would not pose a danger to property or persons" and he or she "is likely to appear for any future proceeding"