Implications for immigrants after SCOTUS ruling on Sessions v. Dimaya

In a landmark decision that sends ripples through the immigration enforcement landscape, the Supreme Court of the United States struck down a key provision used to deport immigrants convicted of certain crimes. On April 17, 2018, the Court held in Sessions v. Dimaya that the definition of a “crime of violence” under 18 U.S.C. § 16(b) is unconstitutionally vague. This 5-4 ruling provides immediate relief to many noncitizens facing removal while signaling a broader judicial skepticism toward broad, ill-defined deportation triggers. For immigrants, their families, and the attorneys who represent them, the decision is a powerful reaffirmation of due process principles that demand clarity from the laws that can tear lives apart.

The Case Behind the Headlines: James Dimaya’s Fight

James Dimaya, a lawful permanent resident from the Philippines, found himself on the brink of deportation after two convictions for first-degree burglary under California law. The immigration authorities classified those offenses as “aggravated felonies” under the Immigration and Nationality Act (INA) by treating them as crimes of violence under § 16(b). That subsection defines a crime of violence as any felony “that, by its nature, involves a substantial risk that physical force against the person or property of another may be used in the course of committing the offense.” For years, immigration judges and the Board of Immigration Appeals (BIA) read this provision broadly, sweeping in a wide range of state offenses with little regard for the actual conduct involved. Dimaya challenged this interpretation, arguing that the language failed to give fair notice of what conduct would subject him to mandatory detention and removal.

The stakes could not have been higher. A conviction labeled as an aggravated felony triggers some of the harshest consequences in immigration law: mandatory detention during proceedings, ineligibility for almost all forms of relief from removal, and a near-automatic deportation order. For Dimaya, the difference between remaining a legal permanent resident and permanent exile turned on whether California first-degree burglary fell within § 16(b). The Ninth Circuit Court of Appeals agreed with him, relying on the Supreme Court’s 2015 decision in Johnson v. United States, which had invalidated a similar residual clause in the Armed Career Criminal Act (ACCA). The government appealed, and the Supreme Court granted certiorari to resolve the constitutional question.

Understanding the Vagueness Doctrine

At its core, the void-for-vagueness doctrine is a bedrock principle of American constitutional law. Rooted in the Due Process Clauses of the Fifth and Fourteenth Amendments, it requires that criminal laws—and those with severe civil consequences—give ordinary people fair notice of what is prohibited. A statute is unconstitutionally vague if it either fails to provide sufficient notice of the conduct it punishes or invites arbitrary and discriminatory enforcement by judges and prosecutors. In the immigration context, where deportation is often described as a “drastic measure” tantamount to banishment, courts have applied this doctrine with heightened scrutiny.

The doctrine serves two essential functions. First, it protects individuals from being caught in a legal trap where they cannot reasonably understand what the law demands. Second, it prevents the government from wielding standardless power over people’s lives, ensuring that enforcement decisions are guided by clear legislative directives rather than the whims of individual officers. In Dimaya, the justices grappled with whether § 16(b) satisfied these fundamental requirements. The majority concluded that it did not, finding that the provision invited exactly the kind of arbitrary decision-making that the Constitution forbids.

Inside the Supreme Court’s Reasoning

Justice Elena Kagan, writing for the five-justice majority, drew a direct parallel to Johnson v. United States. In that case, the Court had struck down the ACCA’s residual clause, which defined a “violent felony” as one that “otherwise involves conduct that presents a serious potential risk of physical injury to another.” The problem, the Court found, was that the clause required judges to imagine the “ordinary case” of a crime and then assess the risk it posed—a speculative inquiry without any clear standard. Section 16(b), Justice Kagan explained, suffers from the same twin defects. It forces courts to picture an idealized, ordinary version of the offense and to measure the level of risk that would make the crime “violent.” Neither step provides a reliable compass.

“Instead of clarifying what type of conduct is being outlawed, the statute has given rise to ‘more unpredictability and arbitrariness’ than Due Process allows.”

The majority rejected the government’s argument that § 16(b) is narrower than the ACCA clause because it requires a “substantial risk” rather than a “serious potential risk.” The difference, Justice Kagan noted, is one of degree, not of kind. Both formulations leave judges adrift in a sea of subjectivity, without a statutory baseline for what constitutes a sufficient risk or how to derive the ordinary case. The dissent, led by Chief Justice Roberts, argued that the language provided enough guidance and that the decision would cause disruption in the immigration system. But the majority held firm: when a law subjects a person to mandatory deportation, the Constitution demands more than guesswork.

Immediate Effects on Removal Proceedings

The most direct impact of Dimaya is on noncitizens currently in removal proceedings whose deportability hinges on the now-defunct § 16(b) residual clause. Immigration judges and the BIA can no longer rely on that provision to classify an offense as a crime of violence aggravated felony. This means that many individuals charged as aggravated felons solely because of § 16(b) may now have a strong argument for termination of their proceedings or, at minimum, for eligibility for relief from removal that was previously barred. Cases that have been languishing on the basis of a § 16(b) determination must be reassessed under other, more specific parts of the statutory framework.

Additionally, the ruling has retroactive effect in pending cases and in those where a removal order is not yet final. Immigrants who have been ordered deported on the basis of § 16(b) may be able to file motions to reopen their cases, though time and procedural bars will apply. Attorneys are already combing through old files to identify clients who might benefit. For many, the decision opens a door that had been slammed shut by a vague and overbroad provision. However, it is critical to note that the ruling does not affect convictions that qualify under the enumerated offenses in the INA or under the elements clause of § 16(a), which requires actual, attempted, or threatened use of physical force. The fight continues on a case-by-case basis.

Broader Implications for Immigration Law

Beyond the immediate removal context, Dimaya casts a long shadow over other vague terms embedded in immigration statutes. The INA is riddled with phrases like “crime involving moral turpitude,” “particularly serious crime,” and “good moral character” that have long been criticized for their ambiguity. While Dimaya does not directly strike down those provisions, it provides a potent textual and doctrinal weapon for future challenges. If a statute that defines a ground for deportation lacks clear standards and invites arbitrary enforcement, it may now face a heightened risk of being declared void for vagueness.

Lower courts are already seeing a wave of litigation invoking Dimaya’s logic. Some argue that the decision supports a narrowing construction of the categorical approach used to analyze prior convictions, while others contend that certain state offenses can never be considered crimes of violence absent a clear federal analogue. The ruling also puts pressure on Congress to amend the INA and provide more precise definitions—a task that has divided lawmakers along partisan lines for decades. For now, immigration practitioners must navigate a rapidly shifting landscape where yesterday’s certainties are today’s open questions.

Practical Guidance for Immigrants and Their Families

If you or a loved one is facing removal proceedings or has a past criminal conviction that you believe may have been misclassified under § 16(b), the first step is to seek experienced immigration counsel immediately. Do not assume that the decision automatically cancels a removal order or lifts a detention. Relief depends on the specifics of the conviction, the current status of the case, and the procedural posture. A qualified attorney can review the criminal record, determine whether the conviction rested solely on the now-void provision, and advise on the best course of action—whether that is filing a motion to reopen, seeking a bond hearing, or applying for cancellation of removal.

It is also essential to understand your rights during any interaction with immigration authorities. Our Know Your Rights: A Quick Guide for Immigrants provides a useful overview of what to do if approached by ICE agents, including the right to remain silent and the right to refuse a search without a warrant. Remember that the Dimaya decision does not erase a conviction; it only changes how that conviction is classified for immigration purposes. Good moral character determinations and other discretionary factors may still require concerted advocacy. Stay informed by following our Latest News for ongoing developments.

The Road Ahead: Clarity, Litigation, and Reform

The Supreme Court’s ruling is a victory for due process, but it also reveals the deep flaws in a statutory scheme that has grown unwieldy and inconsistent. Congress has the power to step in and draft a clear, constitutionally sound definition of what constitutes a deportable offense. Until then, the lower courts will continue to wrestle with the aftermath of Dimaya, issuing decisions that will shape the contours of immigration enforcement for years to come. Several cases already pending in the federal appellate courts may extend the holding to other provisions of the INA, potentially further limiting the government’s ability to rely on vague criminal categories.

For immigrants, the decision underscores the importance of being proactive. If you have a criminal record of any sort, talking to a knowledgeable attorney before any contact with immigration authorities can make the difference between staying in the United States and being separated from your family. The law is fluid, and what seemed like an ironclad ground of deportation yesterday may now be open to challenge. As the nation continues to debate the direction of its immigration policies, Sessions v. Dimaya stands as a reminder that the Constitution sets a floor beneath which no statute may sink—no matter how expedient a broad reading might seem. For now, many lawful permanent residents and other noncitizens breathe a little easier, knowing that the law must speak clearly before it can banish them from their homes.