The Supreme Court of the United States decides Lochner v. New York, which holds that the "right to free contract" is implicit in the due process clause of the Fourteenth Amendment to the United States Constitution.

The Supreme Court of the United States (SCOTUS) is the highest court in the federal judiciary of the United States. It has ultimate appellate jurisdiction over all U.S. federal court cases, and over state court cases that turn on questions of U.S. constitutional or federal law. It also has original jurisdiction over a narrow range of cases, specifically "all Cases affecting Ambassadors, other public Ministers and Consuls, and those in which a State shall be Party." In 1803, the court asserted itself the power of judicial review, the ability to invalidate a statute for violating a provision of the Constitution via the landmark case Marbury v. Madison. It is also able to strike down presidential directives for violating either the Constitution or statutory law.

Lochner v. New York, 198 U.S. 45 (1905), was a landmark decision of the U.S. Supreme Court holding that a New York State statute that prescribed maximum working hours for bakers violated the bakers' right to freedom of contract under the Fourteenth Amendment to the U.S. Constitution. The decision has since been effectively overturned.

Freedom of contract is the principle according to which individuals and groups may form contracts without government restrictions. This is opposed to government regulations such as minimum-wage laws, competition laws, economic sanctions, restrictions on price fixing, or restrictions on contracting with undocumented workers. Freedom to contract underpins laissez-faire economics and is a cornerstone of free-market libertarianism. The proponents of the concept believe that through "freedom of contract", individuals possess a general freedom to choose with whom to contract, whether to contract or not, and on which terms to contract.

Due process of law is application by the state of all legal rules and principles pertaining to a case so all legal rights that are owed to a person are respected. Due process balances the power of law of the land and protects the individual person from it. When a government harms a person without following the exact course of the law, this constitutes a due process violation, which offends the rule of law.