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Relationships

Among states

Under Article Four of the United States Constitution, which outlines the relationship between the states, the United States Congress has the power to admit new states to the Union. The states are required to give full faith and credit to the acts of each other's legislatures and courts, which is generally held to include the recognition of legal contracts and criminal judgments, and before 1865, slavery status. Regardless of the Full Faith and Credit Clause, some legal arrangements, such as professional licensure and marriages, may be state-specific, and until recently states have not been found by the courts to be required to honor such arrangements from other states.<ref name="interracial">{{#invoke:citation/CS1|citation |CitationClass=news }}</ref>

Such legal acts are nevertheless often recognized state-to-state according to the common practice of comity. States are prohibited from discriminating against citizens of other states with respect to their basic rights, under the Privileges and Immunities Clause. Under the Extradition Clause, a state must extradite people located there who have fled charges of "treason, felony, or other crimes" in another state if the other state so demands. The principle of hot pursuit of a presumed felon and arrest by the law officers of one state in another state are often permitted by a state.<ref>{{#invoke:citation/CS1|citation |CitationClass=web }}</ref>

With the consent of Congress, states may enter into interstate compacts, agreements between two or more states. Compacts are frequently used to manage a shared resource, such as transportation infrastructure or water rights.<ref>{{#invoke:citation/CS1|citation |CitationClass=web }}</ref>

With the federal government

The states are guaranteed military and civil defense by the federal government, which is also required to ensure that the government of each state remains a republic.

Four states use the official name of Commonwealth, rather than State.<ref>a. Third Constitution of Kentucky (1850), Article 2, Section 1 ff. Other portions of the same Constitution refer to the "State of Kentucky"
b. Constitution of the Commonwealth of Massachusetts, Preamble.
c. Constitution of Pennsylvania, Preamble.
d. Constitution of Virginia (1971), Article IV, Section 1.</ref> However, this is merely a paper distinction, and the U.S. Constitution uniformly refers to all of these subnational jurisdictions as "States" (Article One, Section 2, Clause 1 of the Constitution, concerning the U.S. House of Representatives, in which Representatives are to be elected by the people of the "States"; Article One, Section 3, Clause 1, concerning the U.S. Senate, allocates to each "State" two Senators). For all of these purposes, each of the four above-mentioned "Commonwealths" counts as a State. This is not to be confused with the two commonwealths of Puerto Rico and the Northern Mariana Islands, which are both territories of the United States.


U.S. state sections
Intro  Map  Federal power  Governments  Relationships  Admission into the Union  Secession  Commonwealths  Origins of states' names  Geography  See also  References  Further reading  External links  

Relationships
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