Who can still declare the law unconstitutional?

Asked by: Brayan Heathcote  |  Last update: March 5, 2026
Score: 4.4/5 (73 votes)

In the U.S. system, the Judicial Branch, particularly the U.S. Supreme Court, holds the primary authority to declare laws unconstitutional through judicial review, a power established by Marbury v. Madison (1803), though federal and state courts can also make these rulings, with the Supreme Court having the final say, ensuring adherence to the Constitution over conflicting laws.

Who can declare that a law is unconstitutional?

The best-known power of the Supreme Court is judicial review, or the ability of the Court to declare a Legislative or Executive act in violation of the Constitution, is not found within the text of the Constitution itself.

Who decides if laws are unconstitutional?

The Justices of the Supreme Court, nominated by the president and confirmed by the Senate, can overturn unconstitutional laws.

Who holds a law to be unconstitutional?

State lawsuits challenging federal law

A state may challenge the constitutionality of a federal statute by filing a lawsuit in court seeking to declare the federal law unconstitutional. Such a lawsuit is decided by the courts, with the Supreme Court having final jurisdiction.

Can laws be unconstitutional?

Unconstitutional refers to anything that transgresses or is antithetical to a constitution, especially the United States Constitution. In the context of the U.S. legal system, if a law, policy, or action is deemed unconstitutional, it means that it violates some part of the Constitution and is therefore invalid.

The DOJ Just Declared a Federal Gun Law Unconstitutional — Why This Matters Everywhere

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Who can overrule the Constitution?

When the Supreme Court rules on a constitutional issue, that judgment is virtually final; its decisions can be altered only by the rarely used procedure of constitutional amendment or by a new ruling of the Court. However, when the Court interprets a statute, new legislative action can be taken.

Can a president override a law?

The veto power does not give the President the power to amend or alter the content of legislation—the President only has the ability to accept or reject an entire act passed by Congress. The President, however, can influence and shape legislation by a threat of a veto.

Do Republicans or Democrats control the Supreme Court?

The U.S. Supreme Court currently has a 6-3 majority of Republican-appointed justices, making it a conservative-leaning court, a balance solidified by appointments from Presidents George W. Bush, Donald Trump, and a shift after the passing of Justice Ruth Bader Ginsburg, with only three justices appointed by Democrats. This conservative supermajority typically consists of Chief Justice John Roberts and Justices Clarence Thomas, Samuel Alito, Neil Gorsuch, Brett Kavanaugh, and Amy Coney Barrett, while the liberal wing includes Justices Sonia Sotomayor, Elena Kagan, and Ketanji Brown Jackson. 

Does federal law trump state law?

Yes, under the U.S. Constitution's Supremacy Clause, valid federal laws and the Constitution itself are the "supreme Law of the Land" and take priority, or "trump," conflicting state laws, a principle known as preemption. When a federal law and a state law conflict, federal law generally prevails, though determining if preemption applies can involve complex analysis of Congress's intent, especially when federal power isn't explicitly stated as exclusive. 

Can an executive order override the Constitution?

No, an executive order cannot override the Constitution; it must be grounded in existing constitutional authority or a statute passed by Congress, and any order that violates constitutional rights (like free speech or equal protection) or usurps legislative power is unlawful and can be struck down by the courts. While EOs direct federal agencies and can have significant immediate impacts, they are not permanent laws, can be reversed by future presidents, and are subject to judicial review, acting as a crucial check on presidential power, say legal experts at the American Constitution Society. 

Do judges have more power than the president?

Federal laws, for example, are passed by Congress and signed by the President. The judicial branch, in turn, has the authority to decide the constitutionality of federal laws and resolve other cases involving federal laws. But judges depend upon the executive branch to enforce court decisions.

Does the president decide if a law is constitutional?

Third, the Faithful Execution Clause requires the President to choose the Constitution over unconstitutional laws, in the same way that courts must choose the former over the latter. Consistent with these understandings, John Adams and Thomas Jefferson argued that executives could not enforce unconstitutional laws.

What does article 4 section 4 of the Constitution mean?

Article IV, Section 4 of the U.S. Constitution, known as the Guarantee Clause, means the federal government must guarantee every state a republican form of government, protect them from invasion, and protect them from domestic violence if requested by the state's legislature or executive. This clause ensures states have representative governments, provides federal aid against external threats, and offers assistance for internal unrest, balancing state autonomy with national security and stability. 

What is the Article 111 of the Constitution?

The Trial of all Crimes, except in Cases of Impeachment, shall be by Jury; and such Trial shall be held in the State where the said Crimes shall have been committed; but when not committed within any State, the Trial shall be at such Place or Places as the Congress may by Law have directed.

What is certiorari meaning in law?

The word certiorari comes from Law Latin, meaning "to be more fully informed." A writ of certiorari orders a lower court to deliver its record in a case so that the higher court may review it. The writ of certiorari is a common law writ, which may be abrogated or controlled entirely by statute or court rules.

Who can overrule the Supreme Court?

A Supreme Court decision can be overturned by another Supreme Court ruling (a new case), a Constitutional Amendment, or if the ruling interpreted a federal statute, by Congress passing a new law. While the President can't overturn a decision directly, they influence future courts through appointments, and Congress can pass legislation to clarify or change laws interpreted by the Court. 

When was the last time the Supreme Court had a liberal majority?

The Warren Court was the period in the history of the Supreme Court of the United States from 1953 to 1969 when Earl Warren served as the chief justice. The Warren Court is widely regarded as the most liberal Supreme Court in U.S. history and marks the last period in which liberals held clear control of the Court.

Can Congress get rid of the Supreme Court?

“No provision in the Constitution gives [Congress] the authority to regulate the Supreme Court, period,” Justice Alito told the Wall Street Journal in 2023.

What can the President not do?

A PRESIDENT CANNOT . . .

  • make laws.
  • declare war.
  • decide how federal money will be spent.
  • interpret laws.
  • choose Cabinet members or Supreme Court Justices without Senate approval.

How many times has Joe Biden vetoed a bill?

As of early January 2026, President Joe Biden has vetoed 13 bills, primarily during the 117th and 118th Congresses, according to the U.S. House and Senate historical records, including his first veto in March 2023 against a measure overturning an ESG rule. 

Who can overrule the President of the United States?

While no single person can "overrule" the President, Congress (by overriding vetoes or passing legislation), the Judiciary (by striking down unconstitutional actions), the Vice President and Cabinet (under the 25th Amendment for disability), and even the next President (by reversing executive orders) can significantly limit or overturn presidential authority through checks and balances. 

What is considered the worst Supreme Court case ever?

While subjective, Dred Scott v. Sandford (1857) is widely considered the worst Supreme Court case ever for denying Black people citizenship, fueling slavery, and pushing the nation toward Civil War, with other notorious decisions including Plessy v. Ferguson (1896) (sanctioning segregation) and Korematsu v. United States (1944) (upholding Japanese internment). More recent controversial rulings often cited include Citizens United v. FEC (2010) (campaign finance) and Kelo v. New London (2005) (eminent domain). 

What laws can never be passed by Congress?

No Bill of Attainder or ex post facto Law shall be passed. No Capitation, or other direct, Tax shall be laid, unless in Proportion to the Census or Enumeration herein before directed to be taken. No Tax or Duty shall be laid on Articles exported from any State.

Has the Supreme Court ever overturned a previous ruling?

Yes, the U.S. Supreme Court frequently reverses its own prior decisions and those of lower courts, a process known as overturning precedent, with famous examples including Brown v. Board of Education (overruling Plessy v. Ferguson) and West Coast Hotel v. Parrish (ending the Lochner era), demonstrating the Court's ability to correct perceived errors and adapt to changing societal understanding.