Sonia Sotomayor

Sonia Sotomayor’s most famous dissent was built on someone else’s homework — and she said so on the record. When the Supreme Court upheld President Trump’s travel ban 5–4 in Trump v. Hawaii on June 26, 2018, her dissent drew on an amicus brief filed the year before by civil-rights litigator Amir Ali, challenging what he called the president’s “Muslim ban” executive order (The Vetting Room). The brief asked the Court for a declaratory judgment and an injunction halting the order; Sotomayor cited Ali’s brief in her dissent (The Vetting Room). The MacArthur Justice Center, whose attorneys filed the brief, records that she explained its value this way: “the full record paints a far more harrowing picture, from which a reasonable observer would readily conclude that the Proclamation was motivated by hostility and animus toward the Muslim faith” (MacArthur Justice Center). That is the profile’s starting point — the brief-to-dissent lineage is verified across two independent full reads, yet none of the leading biographical results mention it.

Early life and education

Sotomayor was born June 25, 1954, in the Bronx, New York, the daughter of parents who moved to New York City from Puerto Rico (Britannica). She was raised in a housing project in the Bronx; after her father’s death, her mother worked long hours as a nurse to support the family (Britannica). As a child she watched episodes of the television crime show Perry Mason (1957–66) and credits the show with influencing her decision to become a lawyer (Britannica). She graduated summa cum laude from Princeton University with a B.A. in 1976, then attended Yale Law School, where she worked as an editor of the Yale Law Journal and graduated in 1979 (Britannica).

Prosecutor and private practice

Sotomayor worked five years as an assistant district attorney in New York County before entering private practice in a New York firm, where she handled intellectual property and copyright cases (Britannica). (Other leads give the ADA tenure as four and a half years; the profile follows Britannica, which was read in full here.) The copyright work was an unusual specialty for a future justice, and it sat quietly in her biography until her nomination.

Federal bench

President George H.W. Bush appointed Sotomayor to the U.S. District Court for the Southern District of New York in 1992 (Britannica). As a federal judge she drew national attention in 1995, when she ruled in favor of Major League Baseball players, then on strike, who were suing over changes to the free-agent system and salary arbitration rules — her injunction against the team owners effectively ended the eight-month strike (Britannica).

When President Bill Clinton nominated her to the U.S. Court of Appeals for the Second Circuit in 1997, Republican senators delayed her appointment for more than a year out of concern that the position might lead to a Supreme Court nomination (Britannica). She took the seat in 1998 and became known for a candid, direct speaking style and carefully reasoned decisions (Britannica). Two decisions from those years later shadowed her. In 2001 she ruled for a woman with dyslexia seeking more accommodations under the Americans with Disabilities Act to take the bar exam; and in 2008, in Ricci v. DeStefano, she and two other judges accepted a lower court’s ruling against a group of white firefighters from New Haven, Connecticut, who had sued the city for discarding a promotional test whose results had effectively barred all African American firefighters from promotion — a decision the Supreme Court reversed in June 2009 (Britannica).

Supreme Court nomination and confirmation

In May 2009 President Barack Obama nominated Sotomayor to fill the vacancy left by departing Justice David Souter (Britannica). She drew early criticism on two fronts: for once stating that government policy was made in the Court of Appeals rather than the legislative branch, and, in a different speech, that a Latina judge was better equipped to make judgments than a white man (Britannica). Her diabetes also raised questions about her longevity on the Court (Britannica). Her confirmation hearings before the Senate Judiciary Committee in July 2009 went smoothly, and the Senate confirmed her 68–31 the following month — making her the first Hispanic and the third woman to serve on the Supreme Court (Britannica).

Majority opinions

Sotomayor’s first majority opinion for the Court, Mohawk Industries, Inc. v. Carpenter (2009), was a unanimous decision on pretrial disclosure orders — and was recognized as the first Supreme Court decision to use the term “undocumented immigrant” in place of “illegal alien” (Britannica). Later majority opinions include J.D.B. v. North Carolina (2011), holding that a child’s age matters in deciding whether police questioning amounts to “custody” under Miranda, and Mohamad v. Palestinian Authority (2012), holding that the Torture Victim Protection Act does not impose liability on organizations (Britannica). She joined the majority opinions in United States v. Windsor (2013), Obergefell v. Hodges (2015), and Bostock v. Clayton County (2020) (Britannica). In 2025 she spoke for the Court’s majority in Glossip v. Oklahoma, ordering a new trial for a murder defendant convicted on the testimony of an accuser who falsely denied having seen a psychiatrist — when he was in fact under treatment for bipolar disorder and prosecutors had concealed the evidence (Britannica).

Dissenting voice

As a consistently liberal justice on a Court whose majority was consistently conservative, Sotomayor dissented frequently and forcefully (Britannica). The profile opened with Trump v. Hawaii (2018). Later landmark dissents include Trump v. United States (2024), on presidential immunity from criminal prosecution for official acts, and Trump v. CASA, Inc. (2025), which held that federal courts may not issue nationwide preliminary injunctions — a ruling that overturned injunctions blocking an executive order eliminating birthright citizenship (Britannica). In CASA she declared that “the Court’s decision is nothing less than an open invitation for the Government to bypass the Constitution,” closing with a passage Britannica quotes in full: “The rule of law is not a given in this Nation, nor any other. It is a precept of our democracy that will endure only if those brave enough in every branch fight for its survival. Today, the Court abdicates its vital role in that effort.… Rather than stand firm, the Court gives way. Because such complicity should know no place in our system of law, I dissent” (Britannica). Her memoir, My Beloved World, was published in 2013 (Britannica).

What this profile does not claim

This profile does not state the age at which her father died or her diabetes diagnosis date (search-leads only). It does not reproduce the full text of her Hawaii dissent — only the passage the MacArthur Justice Center quotes. It does not catalogue every dissent she has written; the ones named are those Britannica’s account, read in full, identifies as notable. The assistant-district-attorney tenure is given as five years per Britannica; a lead claiming four and a half years is noted in the open items rather than reconciled by guesswork.