Cante Mijangos v. Bondi: Waiver of Nexus Challenges in Asylum Petitions—Perfunctory Briefing Forfeits Review

Introduction

In Cante Mijangos v. Bondi (1st Cir. Feb. 18, 2026), the First Circuit denied a petition for review brought by Rosa Lidia Cante Mijangos, a Guatemalan national who suffered severe domestic violence and sexual abuse by her former partner, Walter. After entering the United States in 2014, she sought asylum and withholding of removal, asserting membership in a particular social group (PSG) framed before the agency as “Guatemalan women unable to leave a domestic relationship.”

The central legal issue on appeal was not whether the abuse occurred (the court did not minimize it), but whether the petitioner properly challenged the agency’s dispositive determination that she failed to establish the required “nexus” between the harm and a protected ground. The court held that she did not, because her brief did not develop an argument contesting the BIA’s nexus ruling—resulting in waiver and denial of the petition.

Summary of the Opinion

The Immigration Judge (IJ) denied relief, concluding (among other grounds) that the petitioner failed to prove Walter abused her “on account of” her asserted PSG; instead, the IJ found the abuse stemmed from Walter’s “uncontrolled abusive nature.” The Board of Immigration Appeals (BIA) affirmed, assuming credibility but upholding the no-nexus finding and also seeing no clear error in the IJ’s additional findings (including that the Guatemalan government was not shown unable or unwilling to protect her).

The First Circuit denied review because the petitioner’s opening brief did not meaningfully address the agency’s nexus determination. Citing the waiver doctrine, the court ruled it would not reach the merits where the appellant fails to provide developed argumentation on the dispositive issue. Her focus on PSG cognizability did not cure the failure, because nexus remained independently fatal to asylum and withholding claims.

Analysis

Precedents Cited

1) Appellate review framework: BIA-focused review and standards

  • Ferreira v. Garland: The court reiterated that review centers on the BIA’s decision, while also reviewing portions of the IJ decision “to the extent that the BIA deferred to or adopted the IJ’s reasoning.” This framed the court’s approach to treating the IJ and BIA decisions “as a unit” where appropriate.
  • Chavez v. Garland: Cited within Ferreira for the same BIA/IJ review principle; it reinforces that petitioners must address the reasoning actually adopted by the BIA.
  • Ferreira v. Garland (substantial evidence / de novo): The court cited Ferreira for the substantial evidence standard for factual findings and set up the distinction between factual and legal review.
  • Alves v. Bondi: Cited for de novo review of legal conclusions and later for the idea that where a dispositive element is missing (nexus), claims fail without reaching alternative grounds—supporting the court’s decision to stop at waiver.
  • Khalil v. Garland and Caz v. Garland: Used to describe how the court draws facts from the administrative record, including testimony before the IJ. While not outcome-determinative here, these cases situate the opinion within routine administrative-record review.

2) The asylum and withholding elements: “refugee,” nexus, and private-actor persecution

  • De Pena-Paniagua v. Barr: Quoted for the INA’s refugee definition—persecution “on account of” a protected ground (race, religion, nationality, PSG, political opinion). This anchors nexus as a statutory requirement, not a discretionary gloss.
  • Medina-Suguilanda v. Garland: Cited for the additional requirement in private-actor persecution claims: the applicant must show the government was “unable or unwilling” to protect them. The agency found the petitioner failed on this too, but the First Circuit did not reach it because waiver on nexus ended the case.
  • Espinoza-Ochoa v. Garland: Cited repeatedly for (a) the “one central reason” test for asylum nexus (by reference to the statute), (b) the parallel nexus requirement for withholding, and (c) the articulation that the protected ground must not be “incidental, tangential, superficial, or subordinate.”
  • Barnica-Lopez v. Garland, Aldana-Ramos v. Holder, and Khalil v. Garland: These cases collectively supply the First Circuit’s “mixed-motive” framework. They emphasize that multiple motives can exist and the protected ground need not be the sole reason; however, it must be central rather than subordinate. The opinion notes the petitioner did not mount a legal challenge to the agency’s application of this line of cases—reinforcing why waiver mattered.
  • Sanchez-Vasquez v. Garland: Cited for the withholding standard (“clear probability” of persecution on account of a protected ground), highlighting that withholding is harder to obtain than asylum.

3) Waiver doctrine and its decisive force in this petition

  • United States v. Zannino: The linchpin for the court’s waiver holding. The opinion quotes the canonical First Circuit rule: “issues adverted to in a perfunctory manner, unaccompanied by some effort at developed argumentation, are deemed waived.” This provided the doctrinal basis to deny review without engaging the factual record on nexus.
  • Pazine v. Garland: Cited for the proposition that without nexus, harm “isn’t a ground for asylum” and that an asylum claim fails “right out of the gate.” This supports the court’s conclusion that, once nexus is unchallenged or unproven, further analysis is unnecessary.
  • Gonzalez-Arevalo v. Garland: Cited to explain that failure to meet the asylum standard necessarily defeats withholding of removal because withholding imposes a higher bar. This allowed the court to deny both forms of relief based on the same dispositive deficiency.

Legal Reasoning

  1. The agency’s dispositive rationale was nexus. The BIA affirmed the IJ’s no-nexus finding—agreeing there was no clear error in concluding that Walter’s abuse was driven by his “uncontrolled abusive nature,” not by an intent to harm the petitioner because of her membership in the asserted PSG.
  2. The petition did not confront the nexus ruling with developed argument. The First Circuit emphasized that the petitioner’s brief asserted, in conclusory fashion, that the record “compels” a finding of persecution “on account of being a Guatemalan woman,” but did not provide record-based reasoning tying Walter’s motivation to the asserted PSG nor a legal argument challenging how the agency applied mixed-motive precedent.
  3. Perfunctory assertions triggered waiver under First Circuit law. Relying on United States v. Zannino, the court treated the nexus issue as waived because it was not supported with developed analysis. This was not a mere technicality: it reflected the court’s view that it is not the judiciary’s role to construct arguments the petitioner did not make, especially in a record-bound administrative review context.
  4. Arguing PSG cognizability could not salvage the appeal. The petitioner’s substantial briefing addressed whether “Guatemalan women” could be a cognizable PSG. The court held that this was beside the point because nexus is independently required “regardless of the asserted PSG,” and the court could deny on nexus waiver alone. The opinion also noted (in a footnote) a mismatch between the PSG framed before the agency (“Guatemalan women unable to leave a domestic relationship”) and the PSG argued to the court (“Guatemalan women”), but expressly declined to resolve implications because the case was denied on other grounds.
  5. Withholding fell with asylum. Because withholding requires at least as strong a showing on nexus (and a higher likelihood of future persecution), the petitioner’s failure to overcome the asylum nexus problem—and failure to properly challenge it—also defeated withholding.

Impact

The opinion’s practical rule is procedural but powerful: in First Circuit immigration petitions, a failure to develop an argument addressing the BIA’s dispositive element—here, nexus—will result in denial, even where the underlying facts reflect grave harm.

Likely effects include:

  • Briefing discipline becomes outcome-determinative. Petitioners must target the agency’s actual basis for decision; arguing a different element (e.g., PSG validity) will not carry the case if nexus (or another dispositive element) is left unaddressed.
  • Nexus remains a major barrier in domestic-violence-based claims. The agency’s characterization of abuse as personal violence rather than protected-ground persecution frequently drives outcomes. This case underscores that appellate courts will not reweigh that characterization unless petitioners squarely challenge it with record citations and legal theory.
  • Reinforcement of the “mixed-motive” line—by omission. By highlighting that the petitioner did not challenge the application of Khalil, Barnica-Lopez, Aldana-Ramos, and Espinoza-Ochoa, the opinion signals that mixed-motive arguments must be explicitly built (showing centrality, not mere presence, of the protected ground).

Complex Concepts Simplified

  • “Nexus” (“on account of”). It is not enough to show serious harm. The applicant must show the harm was inflicted because of a protected characteristic (race, religion, nationality, political opinion, or membership in a PSG). If the harm is found to be motivated by purely personal reasons (e.g., an abuser’s general violence), nexus may fail.
  • “One central reason” and mixed motives. A persecutor can have multiple motives. The protected ground need not be the only reason, but it must be a central reason—not a minor or incidental one.
  • Particular Social Group (PSG). A PSG is a protected category under asylum law defined by certain criteria (often described in case law as immutability, particularity, and social distinction). Even if a PSG is valid, the applicant must still prove nexus.
  • “Unable or unwilling” to protect (private-actor persecution). When the persecutor is not the government, the applicant must show the state cannot or will not provide protection. The agency found the petitioner failed this too, but the court did not reach it.
  • Waiver on appeal. If a party does not develop an argument in their opening brief—beyond conclusory statements—the appellate court can treat the issue as forfeited and decline to consider it.

Conclusion

Cante Mijangos v. Bondi stands for a clear procedural lesson in First Circuit immigration review: when the BIA’s decision turns on nexus, the petitioner must directly and substantively challenge that nexus determination with record-based and legal argument, or the claim will be denied as waived under United States v. Zannino. The decision also reiterates that without nexus, asylum fails “right out of the gate” (Pazine v. Garland), and withholding necessarily fails as well (Gonzalez-Arevalo v. Garland).