10 U.S.C. §§ 331-335 Sec. 331. Federal aid for State …

insurrection, domestic violence, unlawful combination, or conspiracy, if it– (1) so hinders the execution of the laws of that State, and of the United States within the State, that any part or class of its people is deprived of a right, privilege, immunity, or protection named in the Constitution and secured by law, and the

https://policy.defense.gov/portals/11/documents/hdasa/references/insurrection_act.pdf