The major "fortification" provided, of course, was the veto power. But in addition to providing fortification, the Founders conspicuously and very consciously declined to sap the Executive's strength in the same way they had weakened [487 U.S. 654, 699] the Legislature: by dividing the executive power. Proposals to have multiple executives, or a council of advisers with separate authority were rejected. See 1 M. Farrand, Records of the Federal Convention of 1787, pp. 66, 71-74, 88, 91-92 (rev. ed. 1966); 2 id., at 335-337, 533, 537, 542. Thus, while "[a]ll legislative Powers herein granted shall be vested in a Congress of the United States, which shall consist of a Senate and House of Representatives," U.S. Const., Art. I, 1 (emphasis added), "[t]he executive Power shall be vested in a President of the United States," Art. II, 1, cl. 1 (emphasis added).
That is what this suit is about. Power. The allocation of power among Congress, the President, and the courts in such fashion as to preserve the equilibrium the Constitution sought to establish - so that "a gradual concentration of the several powers in the same department," Federalist No. 51, p. 321 (J. Madison), can effectively be resisted. Frequently an issue of this sort will come before the Court clad, so to speak, in sheep's clothing: the potential of the asserted principle to effect important change in the equilibrium of power is not immediately evident, and must be discerned by a careful and perceptive analysis. But this wolf comes as a wolf.