The United States Supreme Court has held that state welfare laws discriminating against aliens violate the equal protection clause of the fourteenth amendment, and encroach upon the exclusive federal control of immigration.
Graham v. Richardson, 403 U.S. 365 (1971).
John J. Reid,
Constitutional Law - Aliens,
Duq. L. Rev.
Available at: https://dsc.duq.edu/dlr/vol10/iss2/10