“When we presume to have the institutional ability to set effective educational, budgetary, or administrative policy, we transform the least dangerous branch into the most dangerous one. The separation of powers imposes additional restraints on the judiciary’s exercise of its remedial powers. To be sure, this is not a case of one branch of Government encroaching on the prerogatives of another, but rather of the power of the Federal Government over the States. Nonetheless, what the federal courts cannot do at the federal level they cannot do against the States; in either case, Article III courts are constrained by the inherent constitutional limitations on their powers. There simply are certain things that courts, in order to remain courts, cannot and should not do. There is no difference between courts running school systems or prisons and courts running Executive Branch agencies.

In this case, not only did the District Court exercise the legislative power to tax, it also engaged in budgeting, staffing, and educational decisions, in judgments about the location and esthetic quality of the schools, and in administrative oversight and monitoring. These functions involve a legislative or executive, rather than a judicial, power. See generally Jenkins II, 495 U. S., at 65-81 (Kennedy, J., concurring in part and concurring in judgment); Nagel, Separation of Powers and the Scope of Federal Equitable Remedies, 30 Stan. L. Rev. 661 (1978).

As Alexander Hamilton explained the limited authority of the federal courts: “The courts must declare the sense of the law; and if they should be disposed to exercise WILL instead of JUDGMENT, the consequence would equally be the substitution of their pleasure to that of the legislative body.” The Federalist No. 78, at 526. Federal judges cannot make the fundamentally political decisions as to which priorities are to receive funds and staff, which educational goals are to be sought, and which values are to be taught. When federal judges undertake such local, day-to-day tasks, they detract from the independence and dignity of the federal courts and intrude into areas in which they have little expertise. Cf. Mishkin, Federal Courts as State Reformers, 35 Wash. & Lee L. Rev. 949 (1978).”