Markwayne Mullin, Secretary, Department of Homeland Security v. Dahlia Doe

Markwayne Mullin, the Secretary of Homeland Security, and other federal applicants asked the Supreme Court for a stay (a temporary pause) of a ruling from the U.S. Court of Appeals for the Second Circuit. The case is Mullin v. Dahlia Doe, and the record does not describe the underlying merits beyond that Second Circuit ruling. The docket also shows filings by groups including Haitian TPS Holders, the Federation for American Immigration Reform, and Former Federal and State Judges.

The Court deferred consideration of this stay application and a related one, 25A999. It instead treated both as petitions for certiorari before judgment, granted those petitions, consolidated the cases, set oral argument for the second week of the April 2026 session, and set an expedited briefing schedule.

• February 26, 2026

  Application (25A952) for a stay pending appeal, submitted to Justice Sotomayor.

  Document 1Document 2

• February 26, 2026

  Response to application (25A952) requested by Justice Sotomayor, due by 4:00 p.m. (EST) on March 5, 2026.

• March 4, 2026

  Brief amicus curiae of Federation for American Immigration Reform filed.

  Document 1Document 2

• March 5, 2026

  Response to application from respondent Dahlia Doe, et al. filed.

  Document 1Document 2Document 3

• March 5, 2026

  Brief amicus curiae of Former Federal and State Judges filed.

  Document 1Document 2

• March 6, 2026

  Reply of applicant Kristi Noem, Secretary of Homeland Security, et al. filed.

  Document 1Document 2

• March 6, 2026

  Brief amicus curiae of Haitian TPS Holders filed.

  Document 1Document 2

• March 9, 2026

  Letter from Applicant filed.

  Document

• March 16, 2026

  Application (25A952) referred to the Court.

• March 16, 2026

  Consideration of the application for stay (25A952) presented to Justice Sotomayor and by her referred to the Court is deferred. Consideration of the application for stay (25A999) presented to The Chief Justice and by him referred to the Court is also deferred. The applications are also treated as petitions for a writ of certiorari before judgment (25-1083, 25-1084), and the petitions are GRANTED. The cases are consolidated, and a total of one hour is allotted for oral argument. The cases will be heard during the second week of the April 2026 argument session. Petitioners’ brief on the merits, and any amicus curiae briefs in support or in support of neither party, are to be filed on or before Monday March 30, 2026. Respondents’ briefs on the merits and any amicus curiae briefs in support, are to be filed on or before Monday, April 13, 2026. The reply brief, if any, is to be filed on or before Monday, April 20, 2026.

• June 30, 2026

  Application for stay denied as moot.