STRAS, Circuit Judge.

Counsel who presented argument on behalf of the appellant and appeared on the appellant brief was Christopher A. DeLong, of Minneapolis, MN. The following attorneys appeared on the appellant brief; Timothy J. Droske, of St. Paul, MN, now Minnesota Supreme Court Commissioner, and Rabea J. Zayed, of Minneapolis, MN.

Counsel who presented argument on behalf of the appellee and appeared on the appellee brief was Katharine Thornton Buzicky, AUSA, of Minneapolis, MN.

Before GRASZ, STRAS, and KOBES, Circuit Judges.

STRAS, Circuit Judge.

Salvador Nunez-Hernandez believes that the statute criminalizing reentry into this country after removal violates his equal-protection rights. See 8 U.S.C. § 1326(a), (b). He did not raise this issue before the district court, yet he wants us to review it as if he had. We affirm.

I.

Immigration officials have removed Nunez-Hernandez, a Mexican citizen, from the United States numerous times. Following his most recent attempt, they charged him with illegal reentry. See 8 U.S.C. § 1326(a), (b). After initially pleading not guilty, he had a change of heart and accepted a plea agreement. Over the course of about a year, from the filing of the criminal complaint to sentencing, he never once questioned the constitutionality of the illegal-reentry statute.

His legal strategy changed after a federal district court in Nevada concluded that the statute is "racially discriminatory." See United States v. Carrillo-Lopez , 555 F. Supp. 3d. 996, 1016 (D. Nev. 2021) (applying equal-protection principles). Seizing on this development, Nunez-Hernandez decided to launch an equal-protection challenge of his own for the first time on appeal.

II.

Given that we are a court of "review, ... not first view," parties typically have to raise their arguments before getting here. See Zivotofsky ex rel. Zivotofsky v. Clinton , 566 U.S. 189, 201, 132 S.Ct. 1421, 182 L.Ed.2d 423 (2012) (quoting Adarand Constructors, Inc. v. Mineta , 534 U.S. 103, 110, 122 S.Ct. 511, 151 L.Ed.2d 489 (2001) (per curiam)). When they do not, we apply something less than full, non-deferential review, even for legal questions. See Davis v. United States , ––– U.S. ––––, 140 S. Ct. 1060, 1061, 206 L.Ed.2d 371 (2020) (per curiam). Nunez-Hernandez finds himself in that situation today.

A.

Even constitutional arguments can be "forfeited." United States v. Olano , 507 U.S. 725, 731, 113 S.Ct. 1770, 123 L.Ed.2d 508 (1993) (quoting Yakus v. United States , 321 U.S. 414, 444, 64 S.Ct. 660, 88 L.Ed. 834 (1944) ). Forfeiture occurs when a party has an argument available but fails to assert it in time. Id. In criminal cases, the deferential standard we apply to forfeited errors comes from Federal Rule of Criminal Procedure 52(b), which allows us to correct "plain error[s] that affect[ ] substantial rights."

Nunez-Hernandez's failure to raise an equal-protection challenge before the district court is a classic example of forfeiture. See Robinson v. Norling , 25 F.4th 1061, 1062 (8th Cir. 2022). During the six months before he pleaded guilty, he filed more than a dozen motions raising all sorts of issues, but not one of them questioned the constitutionality of the illegal-reentry statute or mentioned equal protection. Had he done so, the district court would have had an opportunity to potentially "correct or avoid the [alleged] mistake" in the first place. Puckett v. United States , 556 U.S. 129, 134, 129 S.Ct. 1423, 173 L.Ed.2d 266 (2009). Under these circumstances, Nunez-Hernandez's constitutional argument receives, at most, plain-error review.

B.

Nunez-Hernandez's response is that his challenge is just too fundamental to forfeit. In his view, a constitutional argument like this one is about the district court's subject-matter jurisdiction. See United States v. Cotton , 535 U.S. 625, 630, 122 S.Ct. 1781, 152 L.Ed.2d 860 (2002) (explaining that subject-matter jurisdiction challenges "can never be forfeited or waived" because they "involve[ ] a court's power to hear a case").

In another era, this argument might have received a more welcoming reception. But today, under a "significantly tightened" understanding of subject-matter jurisdiction, Grocery Mfrs. Ass'n v. EPA , 693 F.3d 169, 183–84 (D.C. Cir. 2012) (Kavanaugh, J., dissenting), "the unconstitutionality of the statute under which the proceeding is brought does not oust a court of jurisdiction," United States v. Williams , 341 U.S. 58, 65, 71 S.Ct. 595, 95 L.Ed. 747 (1951). See Plaut v. Spendthrift Farm, Inc. , 514 U.S. 211, 231, 115 S.Ct. 1447, 131 L.Ed.2d 328 (1995) ("[N]one would suggest that a litigant may never waive the defense that a statute is unconstitutional."); United States v. De Vaughn , 694 F.3d 1141, 1153 (10th Cir. 2012) ("A claim that a criminal statute is unconstitutional does not implicate a court's subject matter jurisdiction."). To the contrary, to reach the merits of a constitutional challenge, a court must have subject-matter jurisdiction. See Steel Co. v. Citizens for a Better Env't , 523 U.S. 83, 101–02, 118 S.Ct. 1003, 140 L.Ed.2d 210 (1998).

It is true, as Nunez-Hernandez argues, that we have used the word jurisdiction in connection with constitutional arguments like the one he advances today. An example is when we described a Second Amendment challenge to a criminal statute as "jurisdictional in nature." United States v. Seay , 620 F.3d 919, 922 (8th Cir. 2010). But these rulings "are patently not jurisdictional in the strict sense." Kircher v. Putnam Funds Tr. , 547 U.S. 633, 642, 126 S.Ct. 2145, 165 L.Ed.2d 92 (2006).

Sometimes the word "jurisdiction" has a special meaning. In Seay , for example, it referred to matters that have nothing to do with subject-matter jurisdiction, like the limited class of defenses that survive a guilty plea. See Seay , 620 F.3d at 922 ; United States v. Morgan , 230 F.3d 1067, 1071 (8th Cir. 2000). Examples include challenges to the validity of the plea itself and, as relevant here, arguments that a criminal statute underlying a conviction is facially unconstitutional. See Morgan , 230 F.3d at 1070–71. Neither, however, involves the "court's ‘power to adjudicate the case.’ " De Vaughn , 694 F.3d at 1153 (quoting Steel Co. , 523 U.S. at 89, 118 S.Ct. 1003 ); see also United States v. Phillips , 645 F.3d 859, 862 (7th Cir. 2011).

Stepping back for a moment, it is clear that the word jurisdiction has "many[ ] meanings." Steel Co. , 523 U.S. at 90, 118 S.Ct. 1003. One is the totally unwaivable and non-forfeitable kind: subject-matter jurisdiction, which refers to "the court's authority to hear a given type of case." Carlsbad Tech., Inc. v. HIF BIO, Inc. , 556 U.S. 635, 639, 129 S.Ct. 1862, 173 L.Ed.2d 843 (2009). The others are special rules, like the one in the guilty-plea context, that are "not jurisdictional in the strict sense," meaning that they cannot save a litigant from the consequences of forfeiture. Kircher , 547 U.S. at 642, 126 S.Ct. 2145. Unfortunately for Nunez-Hernandez, his equal-protection challenge falls into the latter category.

C.

Actually applying plain-error review is straightforward. To succeed, Nunez-Hernandez has to show, among other things, that there was a "clear or obvious [error] under current law." United States v. Hinkeldey , 626 F.3d 1010, 1012 (8th Cir. 2010). The "case law," in other words, must "provide a clear answer." Id. at 1012–13.

Far from providing a clear answer in Nunez-Hernandez's favor, the overwhelming weight of authority goes the other way. There is one district court case on his side, see Carillo-Lopez , 555 F. Supp. 3d at 1001, but at most it shows that the issue is "subject to reasonable dispute," Hinkeldey , 626 F.3d at 1012–13 (quotation marks omitted). Picking one side of a "reasonable dispute" cannot be "clear[ly] or obvious[ly]" wrong. Id.

III.

We accordingly affirm the judgment of the district court and deny the pending motion for judicial notice.