Post–Loper Bright, the Second Circuit Reaffirms Wei Sun: No Pre-Decision Notice Requirement for Corroboration, and Pattern-or-Practice Claims Still Require Proof of Group Inclusion

1. Introduction

In Blanco-Guerrero v. Blanche (2d Cir. Apr. 10, 2026) (summary order), the Second Circuit denied a petition for review challenging the Board of Immigration Appeals’ affirmance of an Immigration Judge’s denial of asylum, withholding of removal, and Convention Against Torture (CAT) relief. Petitioners Juan Alberto Blanco-Guerrero and Annia Margarita Blanco-Rodas, natives and citizens of Nicaragua, claimed persecution tied to political beliefs and participation in anti-government protests.

The case turned less on whether Nicaragua experienced political repression in general and more on a recurring evidentiary problem in asylum litigation: when an applicant’s testimony, even if not deemed incredible, still fails because key facts are not corroborated with reasonably available evidence. A secondary issue concerned whether the agency had to separately evaluate a “pattern or practice” theory of future persecution despite a failure to prove the petitioners’ own inclusion in the allegedly targeted group. The court also addressed the continuing force of the Second Circuit’s corroboration procedure after the Supreme Court’s decision in Loper Bright Enterprises v. Raimondo.

2. Summary of the Opinion

The Second Circuit held that substantial evidence supported the agency’s conclusion that Blanco-Guerrero failed to provide reasonably available corroboration of crucial elements of his claim—his political beliefs, his participation in protests, and the specific past harm alleged. Applying 8 U.S.C. § 1158(b)(1)(B)(ii) and Second Circuit case law, the court affirmed that a failure to provide such corroboration can independently defeat relief.

Critically, the court declined to revisit its earlier approach in Wei Sun v. Sessions, explaining that Loper Bright Enterprises v. Raimondo did not undermine prior cases relying on Chevron-era interpretive methodology. The court also rejected the argument that the agency was required to separately consider a “pattern or practice” claim where the applicant failed to corroborate facts establishing he was similarly situated to the allegedly persecuted group. Finally, the court found certain claims (unasserted bias and harm to a daughter) unexhausted because they were not raised to the BIA.

3. Analysis

3.1. Precedents Cited

A. Scope and standard of review

  • Xue Hong Yang v. U.S. Dep't of Just., 426 F.3d 520 (2d Cir. 2005) and Yan Chen v. Gonzales, 417 F.3d 268 (2d Cir. 2005): These cases anchor the Second Circuit’s practice of reviewing the IJ’s decision “as modified and supplemented by the BIA,” ensuring the court evaluates the operative agency reasoning rather than treating the IJ and BIA decisions as entirely separate.
  • Hong Fei Gao v. Sessions, 891 F.3d 67 (2d Cir. 2018): Cited for the standards of review—substantial evidence for factfinding and de novo review for questions of law and application of law to fact. This matters because corroboration findings are heavily fact-dependent and therefore difficult to overturn.

B. Corroboration as an independent basis to deny relief

  • Wei Sun v. Sessions, 883 F.3d 23 (2d Cir. 2018): The court relied on Wei Sun for two linked propositions: (1) even “generally credible” testimony may be insufficient without corroboration of “crucial facts” when such evidence should be readily available; and (2) before denying solely for lack of corroboration, the IJ must identify missing evidence, give an opportunity to explain, and assess that explanation— but need not do so prior to issuing the IJ decision. This case is the primary doctrinal engine of the decision.
  • Pinel Gomez v. Garland, 52 F.4th 523 (2d Cir. 2022): Reinforces that missing reasonably available corroboration can be dispositive where the applicant’s evidence is “unpersuasive” or lacks “specific facts sufficient” to establish refugee status. Here, it supported the conclusion that country conditions evidence and generalized letters did not substitute for proof of the applicant’s own claimed conduct and harm.

C. Post–Loper Bright treatment of Chevron-era precedent

  • Loper Bright Enterprises v. Raimondo, 603 U.S. 369 (2024) and Chelvron U.S.A. Inc. v. Natural Resources Defense Council, Inc., 467 U.S. 837 (1984): The petitioners urged reconsideration of Wei Sun in light of Loper Bright. The panel rejected that invitation, citing Loper Bright’s own statement that it did “not call into question prior cases that relied on the Chevron framework” and that earlier “holdings ... are still subject to statutory stare decisis.” The upshot is practical: in the Second Circuit, the corroboration framework of Wei Sun remains intact notwithstanding the Supreme Court’s shift away from Chevron.

D. Weight of documentary evidence and “canned” affidavits

  • Y.C. v. Holder, 741 F.3d 324 (2d Cir. 2013): Used for the principle that the court generally defers to the agency’s assessment of the weight of documentary evidence, including concerns about statements from witnesses not subject to cross-examination. The court applied this to discount letters that lacked detail, were derivative of the applicant’s own narrative, or were otherwise weak corroboration.
  • Mei Chai Ye v. U.S. Dep't of Just., 489 F.3d 517 (2d Cir. 2007): Cited for the inference that “striking similarities” between affidavits can indicate they are “canned.” This supported the IJ/BIA’s decision to give little weight to near-identical neighbor statements prepared long after the events.

E. Dispositive effect across asylum, withholding, and CAT when based on the same facts

  • Lecaj v. Holder, 616 F.3d 111 (2d Cir. 2010): Supports the court’s conclusion that because all claims rested on the same factual predicate, the failure to meet the asylum burden necessarily defeated the higher burdens for withholding and CAT relief.

F. Issue exhaustion

  • Vera Punin v. Garland, 108 F.4th 114 (2d Cir. 2024) and Ud Din v. Garland, 72 F.4th 411 (2d Cir. 2023): These cases underscore mandatory issue exhaustion in the Second Circuit when the Government raises it. The panel relied on them to reject new claims (IJ bias and bullying/harassment of the daughter) not presented to the BIA.

3.2. Legal Reasoning

A. The statutory corroboration rule and the applicant’s burden

The court built its analysis on 8 U.S.C. § 1158(b)(1)(B)(ii), which codifies that testimony alone may suffice only if it is credible, persuasive, and specific; and that the factfinder may require corroboration unless the evidence is unavailable and cannot reasonably be obtained. Importantly, the opinion reiterates the Second Circuit’s position that the applicant bears the “ultimate burden” of producing corroboration without prompting (quoting Wei Sun).

B. The Wei Sun three-step procedure (and why it was satisfied here)

The panel concluded that the IJ complied with Wei Sun by:

  1. Identifying missing corroboration: Statements from the wife, family members (in Nicaragua and the U.S.), and friends/coworkers who could confirm participation in the protest and the alleged month in hiding. The brother—present at the hearing—did not testify or submit a statement.
  2. Providing an opportunity to explain: The IJ elicited explanations for why these materials were not provided.
  3. Assessing the explanations: The IJ found the reasons inadequate, particularly where the applicant did not claim unavailability, only that corroboration was unnecessary or unhelpful.

On judicial review, the court emphasized the highly deferential constraint in 8 U.S.C. § 1252(b)(4)(D), which prohibits reversal of a corroboration-availability finding unless a reasonable factfinder would be compelled to conclude the evidence was unavailable.

C. Why the existing documents were deemed insufficient

The panel agreed with the agency that the submitted documents failed to corroborate the applicant’s personal political activity and claimed harms:

  • Country conditions evidence supported that shots were fired at protesters in April 2018, but did not place Blanco-Guerrero at that event.
  • Employer letter did not confirm a key factual detail (abandoning a company truck while fleeing).
  • Human rights center letter lacked specific harm details, appeared based on the applicant’s own report, and was filed the day he fled—factors the agency could view as diminishing corroborative value (with the court deferring under Y.C. v. Holder).
  • Neighbor statements were discounted as late-prepared, from uncross-examined witnesses, nearly identical, and not corroborative of the most serious alleged events (shots fired at him; beating by masked men; presence of an informant in the neighborhood), with Mei Chai Ye supporting the “canned” inference.

D. Pattern-or-practice theory: why it did not require separate consideration on these facts

The court cited 8 C.F.R. §§ 1208.13(b)(2), 1208.16(b)(2) for the rule that an applicant can show a well-founded fear (or withholding fear) by either individualized “singling out” or a “pattern or practice” against similarly situated persons. But it emphasized the accompanying requirement in 8 C.F.R. §§ 1208.13(b)(2)(iii)(B), 1208.16(b)(2)(ii): the applicant must also establish his own inclusion in, and identification with, the targeted group.

Thus, even if repression of protestors were widespread, Blanco-Guerrero’s failure to corroborate that he was a protest participant (and associated harms) meant he could not show he was “similarly situated.” The court treated that deficiency as logically fatal to the pattern-or-practice avenue as presented.

E. Dispositive effect across all forms of relief

Because asylum, withholding, and CAT claims all rested on the same factual predicate, the corroboration failure ended the case. Citing Lecaj v. Holder, the panel reiterated the cascading-burden logic: failure to meet the asylum standard typically precludes the higher burdens required for withholding and CAT where the factual basis is the same.

F. Exhaustion: new allegations cannot be raised first in the court of appeals

The panel rejected claims of IJ bias and failure to consider alleged harm to the daughter as unexhausted, relying on Vera Punin v. Garland and Ud Din v. Garland. This is a procedural reminder: even potentially compelling theories can be jurisdictionally (or mandatorily) barred if not presented to the BIA in a manner that can be “closely matched up” with arguments made on petition for review.

3.3. Impact

  • Corroboration remains a decisive gatekeeper: The decision reinforces that, in the Second Circuit, applicants should expect denial where key facts (membership in a political movement, attendance at specific protests, key incidents of harm) are not corroborated by accessible witnesses or records.
  • Post–Loper Bright continuity: The panel’s explicit statement that Loper Bright Enterprises v. Raimondo does not warrant reconsidering Wei Sun signals institutional stability in the Circuit’s corroboration doctrine, despite the Supreme Court’s broader administrative-law shift.
  • Pattern-or-practice claims will not salvage unproven identity: Applicants cannot rely on general country conditions alone; they must still prove, with credible specifics and corroboration when reasonably available, that they belong to the targeted group.
  • Strategic imperative: build the record at the BIA: Exhaustion holdings underscore that petitioners must present all material issues (including bias claims and derivative harms to family members) to the BIA or risk losing them on review.

4. Complex Concepts Simplified

  • “Substantial evidence” review: The court will uphold agency fact findings unless the record would compel any reasonable adjudicator to reach the opposite conclusion. This is a high hurdle for petitioners.
  • Corroboration (8 U.S.C. § 1158(b)(1)(B)(ii)): Even if testimony is accepted as generally credible, the IJ can require supporting evidence for important facts—letters, affidavits, records—unless truly unavailable.
  • Reasonably available evidence: If a spouse, sibling, parent, or close coworker can be contacted (or is present), the agency may treat corroboration as obtainable. Saying “I didn’t think it was needed” usually will not suffice.
  • “Canned” affidavits: Very similar witness statements may be viewed as coordinated rather than independent, reducing their weight.
  • Pattern or practice: Proof that a country persecutes a group is not enough; the applicant must also show he is part of that group and therefore at risk.
  • Issue exhaustion: Arguments generally must be raised to the BIA first. Courts typically will not consider new theories introduced for the first time on petition for review.

5. Conclusion

Blanco-Guerrero v. Blanche reinforces a practical but powerful rule in Second Circuit asylum law: when key elements of an applicant’s story should be corroborated and the evidence is reasonably obtainable, failure to provide it can independently defeat asylum, withholding, and CAT relief. The panel also clarifies that Loper Bright Enterprises v. Raimondo does not unsettle the Circuit’s existing corroboration framework under Wei Sun v. Sessions, and it reiterates that a “pattern or practice” theory cannot substitute for proof that the applicant is actually a member of the targeted class. Finally, the decision serves as a cautionary note on issue exhaustion: arguments not presented to the BIA will generally not be heard on judicial review.