Due Process

What Is Due Process

Due process is the rule that the government cannot take a person’s life, liberty, or property without fair procedures and legal limits. It protects you whenever the government tries to lock you up, deport you, take your property, or cut off a benefit you depend on. It is the reason the government has to follow the rules before it acts against you, not after.

The promise lives in two parts of the Constitution. The Fifth Amendment (1791) binds the federal government, and the Fourteenth Amendment (1868) binds the states. They guarantee the same thing in nearly identical words.

No person shall be… deprived of life, liberty, or property, without due process of law.

Fifth Amendment (1791)

Nor shall any State deprive any person of life, liberty, or property, without due process of law.

Fourteenth Amendment (1868)

The simplest way to understand procedural due process is to picture what it stops. Before the government can take something important from you, it has to tell you what it plans to do, let you respond, and let someone neutral make the call.

Who Due Process Protects

Due process protects everyone physically present in the country, not only citizens. The text is deliberate. The amendments say “any person” and “no person,” not “any citizen.” That word choice is the heart of the current fight over deportations, because it means an undocumented immigrant is still a “person” the government cannot act against without fair procedure.

The Supreme Court has said so for more than a century, in three rulings worth knowing by name.

The practical meaning is direct. Whether someone entered the country legally or not, the government still has to follow fair procedure before it detains them or removes them. That principle is what the 2025 deportation cases turn on, and it is why the courts kept intervening.

Where Due Process Shows Up

Due process is not only a courtroom idea. It is the rule behind dozens of everyday moments when the government holds power over a person. The common thread is that the government has to give notice and a chance to be heard before it takes something that matters.

The last row is where the fight is now. Immigration removal normally requires notice and a hearing before an immigration judge, with one contested exception called expedited removal. How much process a given situation requires comes from the Mathews test, which scales the procedure to the stakes.

The higher the stakes, the more process the Constitution demands. Deporting someone to a foreign prison is about as high as the stakes get, which is why skipping the hearing draws such close scrutiny.

From Magna Carta to Dobbs

Due process is one of the oldest ideas in the law, and its story runs from a medieval English charter to a 2022 abortion ruling. The phrase “law of the land” first appeared in Magna Carta in 1215, entered the Constitution in the Fifth Amendment in 1791, expanded to the states in the Fourteenth Amendment in 1868, gained procedural muscle through Gideon in 1963, Goldberg in 1970, and Mathews in 1976, grew a substantive branch through Griswold in 1965 and Obergefell in 2015, and saw that branch narrowed when Dobbs overruled Roe in 2022.

1. 1215 Magna Carta, "law of the land" No free man punished "except by the law of the land," the root of due process.
2. 1791 Fifth Amendment ratified The federal government cannot take life, liberty, or property without due process.
3. 1868 Fourteenth Amendment ratified The same guarantee now binds the states, and protects "any person."
4. 1963 Gideon guarantees a lawyer Due process requires appointed counsel for poor defendants in criminal cases.
5. 1970 Goldberg requires a hearing The government must hold a hearing before cutting off welfare benefits.
6. 1976 Mathews sets the balancing test How much process is due depends on the stakes, the risk of error, and the government interest.
7. 2015 Obergefell protects marriage Substantive due process protects the right of same-sex couples to marry.
8. 2022 Dobbs narrows the branch The Court overrules Roe, holding abortion is "not deeply rooted" in history and tradition.

Sources: Cornell LII; Oyez; Constitution Annotated.

The arc of due process, 1215-2022: 1215 — Magna Carta, "law of the land" (No free man punished "except by the law of the land," the root of due process.). 1791 — Fifth Amendment ratified (The federal government cannot take life, liberty, or property without due process.). 1868 — Fourteenth Amendment ratified (The same guarantee now binds the states, and protects "any person."). 1963 — Gideon guarantees a lawyer (Due process requires appointed counsel for poor defendants in criminal cases.). 1970 — Goldberg requires a hearing (The government must hold a hearing before cutting off welfare benefits.). 1976 — Mathews sets the balancing test (How much process is due depends on the stakes, the risk of error, and the government interest.). 2015 — Obergefell protects marriage (Substantive due process protects the right of same-sex couples to marry.). 2022 — Dobbs narrows the branch (The Court overrules Roe, holding abortion is "not deeply rooted" in history and tradition.).

1215: Magna Carta promised that no free man would be punished “except by the law of the land.” That phrase became the seed of due process in English and then American law.

1791: The Fifth Amendment put the guarantee into the Constitution, binding the new federal government. It said no person could be deprived of life, liberty, or property without due process of law.

1868: The Fourteenth Amendment extended the same words to the states after the Civil War. Through the next century the Court used its Due Process Clause to apply most of the Bill of Rights to the states, a process lawyers call incorporation.

1963: In Gideon v. Wainwright the Court held that due process requires the government to provide a lawyer to a criminal defendant who cannot afford one.

1970: In Goldberg v. Kelly the Court held that the government must hold a hearing before it cuts off welfare benefits a family relies on, a landmark for procedural due process.

1976: In Mathews v. Eldridge the Court set the test still used today, balancing the private interest, the risk of a wrong decision, and the government’s interest to decide how much process is due.

2015: In Obergefell v. Hodges the Court held that substantive due process protects the right of same-sex couples to marry, building on Griswold v. Connecticut (1965) on contraception and Lawrence v. Texas (2003) on same-sex intimacy.

2022: In Dobbs v. Jackson the Court overruled Roe v. Wade (1973), holding that abortion is “not deeply rooted in the Nation’s history and traditions.” The ruling narrowed the substantive branch and sharpened a long-running debate over it.

Due Process and Deportation Now

The most urgent due process fight today is over deportations carried out without hearings. In 2025 the government revived a 1798 wartime law and removed people to a foreign prison on roughly a day’s notice, and it deported a man with a court order protecting him by what it admitted was a mistake. The courts pushed back, and the central question of whether the government can skip the hearing is still being litigated as of June 2026.

Start with the law the government used. On March 15, 2025, the administration invoked the Alien Enemies Act of 1798 against the Venezuelan gang Tren de Aragua and flew 137 people to El Salvador’s CECOT prison under that law with no hearings, part of more than 200 sent to CECOT that weekend.

The Supreme Court intervened twice, and the distinction in what it decided matters. Both rulings were about notice and the chance to seek review, not about whether the 1798 law authorizes the removals at all. That deeper question is still open.

The human cost of skipping the hearing is clearest in one case. Kilmar Abrego Garcia, a Salvadoran man living in Maryland since around 2011, had a 2019 immigration-court order, called withholding of removal, that barred his deportation to El Salvador. ICE arrested him on March 12, 2025, and deported him to CECOT on March 15, 2025. The Justice Department admitted it was an administrative error.

The case did not end cleanly. In Noem v. Abrego Garcia (April 10, 2025) the Supreme Court ordered the government to facilitate his return, and he was brought back in June 2025. He was then charged with human smuggling in Tennessee, and a federal judge dismissed the charges in May 2026 as a vindictive prosecution. His lawyers alleged abuse at CECOT in court filings. His status remains unresolved as of June 2026.

Abrego Garcia is not the only case where the hearing came late or not at all. A Columbia graduate student was held for months without charges over a campus protest, and a federal appeals court cleared Texas to arrest and deport people on its own.

A hearing before the deportation, not after, is what catches a mistake while it can still be fixed. The litigation is fast-moving, so the specifics here are accurate as of June 2026 and the merits remain open.

The Fight Over Substantive Due Process

The honest distinction up front is that procedural due process is not in dispute. Notice, a hearing, and a neutral decision-maker are accepted across the political spectrum. The argument is entirely about substantive due process, the idea that some rights are so fundamental that the government cannot take them even with fair procedure. Both sides of that argument deserve a fair hearing.

Supporters say the substantive branch protects rights the Constitution does not list by name. Privacy, marriage, and bodily autonomy are the usual examples, grounded partly in the Ninth Amendment. Writing in the Texas Law Review, defenders argue that without it a state could follow perfectly fair procedures and still pass a deeply unjust law, like banning interracial marriage after a hearing. Fair process, they say, is not enough if the law itself is monstrous.

Critics, mostly originalists, say the clause guarantees fair process, not a license for judges to strike down laws based on their content. Justice Antonin Scalia called substantive due process “an atrocity” and “an oxymoron.” In his concurrence in Dobbs in 2022, Justice Clarence Thomas urged the Court to “reconsider all of this Court’s substantive due process precedents, including Griswold, Lawrence, and Obergefell,” as the ABA Journal reported.

One clarification keeps the debate honest. Thomas’s call was a concurrence, written for himself, not the opinion of the Court. Griswold, Lawrence, and Obergefell remain good law as of June 2026. The debate over the substantive branch is real and unsettled, and we present it without declaring a winner.

Frequently asked questions

Does due process protect people who are not citizens? Yes. The Fifth and Fourteenth Amendments protect “any person,” not just citizens. The Supreme Court has held since Yick Wo v. Hopkins in 1886, and again in Plyler v. Doe (1982) and Zadvydas v. Davis (2001), that due process covers everyone on U.S. soil, including undocumented immigrants.

Did the Supreme Court rule that the Alien Enemies Act deportations were illegal? No. In Trump v. J.G.G. and A.A.R.P. v. Trump, both in 2025, the Court ruled that people must get notice and a chance to seek habeas review before removal. It did not decide whether the 1798 Alien Enemies Act authorizes the removals. That question is still being litigated as of June 2026.

Is due process the same as equal protection? No. Both are in the Fourteenth Amendment, but they do different jobs. Due process is about fair procedure before the government takes your life, liberty, or property. Equal protection forbids the government from discriminating against people.

Did Dobbs end substantive due process? No. Dobbs overruled Roe v. Wade in 2022 and narrowed the substantive branch, but it did not abolish it. Justice Thomas urged the Court to reconsider Griswold, Lawrence, and Obergefell, but that was his concurrence alone. Those rulings remain good law as of June 2026.

What you can do

1. Tell your members of Congress to require a hearing before any deportation. Ask them by name to support legislation that guarantees written notice and a hearing before a neutral immigration judge, with time to find a lawyer, before the government removes anyone. Use the letter and call script below.

2. Ask them to reject the Alien Enemies Act as a deportation tool. A 1798 wartime law should not be a shortcut around the courts. Ask your representatives to publicly oppose using it to bypass hearings, and to support the Neighbors Not Enemies Act (H.R. 630 / S. 193), which repeals it.

3. Learn the related rights so you cannot be misled. Read how habeas corpus lets a detained person force the government to justify holding them, and how birthright citizenship and the Insurrection Act connect to the same fight over executive power.

4. Follow the cases with accurate facts. When someone claims the Supreme Court approved the Alien Enemies Act removals, the answer is that the Court ruled only on notice and review, and the merits are still open. The comparison tables above are built to be shared.

5. Write your representative about requiring a hearing before deportation. Use the letter below and ask for a clear, on-the-record position.