US Constitution in the context of "State governments of the United States"

Freedom of assembly, sometimes used interchangeably with the freedom of association, is the individual right or ability of individuals to peaceably assemble and collectively express, promote, pursue, and defend their ideas. The right to freedom of assembly is recognized as a human right, a political right and a civil liberty.

The terms freedom of assembly and freedom of association may be used to distinguish between the freedom to assemble in public places and the freedom to join an association. Freedom of assembly is often used in the context of the right to protest, while freedom of association is used in the context of labor rights. The Constitution of the United States is interpreted to mean both the freedom to assemble and the freedom to join an association.

In United States constitutional theory, compact theory is an interpretation of the Constitution which asserts the United States was formed through a compact agreed upon by all the states, and that the federal government is thus a creation of the states. Consequently, under the theory, states are the final arbiters over whether the federal government has overstepped the limits of its authority as set forth in the compact. Compact theory contrasts with contract theory, which holds that the United States was formed with the consent of the people—rather than the consent of the states—and thus the federal government has supreme jurisdiction over the states. Compact theory has never been upheld by the courts.

Compact theory featured heavily in arguments by southern political leaders in the run up to the American Civil War that states had a right to nullify federal law and to secede from the union. It also featured in southern arguments opposing desegregation after the 1954 Supreme Court decision in Brown v. Board of Education. The theory also entered into the Mexico–United States border crisis of the early 2020s.

The criminal law of the United States is a manifold system of laws and practices that connects crimes and consequences. In comparison, civil law addresses non-criminal disputes. The system varies considerably by jurisdiction, but conforms to the US Constitution. Generally there are two systems of criminal law to which a person maybe subject; the most frequent is state criminal law, and the other is federal law.

The American Model Penal Code defines the purpose of criminal law as: to prevent any conduct that cause or may cause harm to people or society, to enact public order, to define what acts are criminal, to inform the public what acts constitute crimes, and to distinguish a minor from a serious offense.

Procedural due process is a legal doctrine in the United States that requires government officials to follow fair procedures before depriving a person of life, liberty, or property. When the government seeks to deprive a person of one of those interests, procedural due process requires at least for the government to afford the person notice, an opportunity to be heard, and a decision made by a neutral decisionmaker. Procedural due process is required by the Due Process Clauses of the Fifth and Fourteenth Amendments to the United States Constitution.

The article "Some Kind of Hearing" written by Judge Henry Friendly created a list of basic due process rights "that remains highly influential, as to both content and relative priority." The rights, which apply equally to civil due process and criminal due process, are the following:

Both during and after the American Civil War, pardons for ex-Confederates were given by US presidents Abraham Lincoln and Andrew Johnson and were usually extended for those who had served in the military above the rank of colonel or civilians who had exercised political power under the Confederate government. The power to pardon offences to the US government was given to the chief executive in the US Constitution under Article II.

A public defender is a lawyer appointed to represent people who otherwise cannot reasonably afford to hire a lawyer to defend themselves in a trial. Several countries provide people with public defenders, including the UK, Belgium, Hungary and Singapore, and some states of Australia. Brazil is the only country in which an office of government-paid lawyers with the specific purpose of providing full legal assistance and representation to the needy free of charge is established in the constitution. The Sixth Amendment to the US Constitution, as interpreted by the Supreme Court, requires the US government to provide legal counsel to indigent defendants in criminal cases. Public defenders in the United States are lawyers employed by or under contract with county, state or federal governments.