Republican (constitutionalist) President Jefferson signs the Militia Act of 1807, authorizing the president to use the Army of the united States, as well as the Militias of the several States for law enforcement purposes.
[restored 11/19/2021]
Subsequent Events:
Authority:
Article I, Section 8 [Clauses 15 and 16]
ccc-2point0.com/constitution-for-the-united-states
References:
William M. Weicek, The Guarantee Clause of the U.S. Constitution, (Ithaca, New York and London: Cornell University Press, 1972), 81.