"The U.S. is a common law country. In all states except Louisiana (which is based on the French civil code), the common law of England was adopted as the general law of the state, EXCEPT when a statute provides otherwise. Common law has no statutory basis; judges establish common law through written opinions that are binding on future decisions of lower courts in the same jurisdiction."
https://www.upcounsel.com/legal-def-common-law
"The common law prevails when the US' Constitution is suspended."
https://twitter.com/KarenHudes/status/1270526204005752834
"Common law is a body of unwritten laws based on legal precedents established by the courts."
https://www.bartleylawoffice.com/tips/what-is-judge-made-law.html