A gross, invidious possibility

… who can think it possible that the president and two-thirds of the senate will ever be capable of such unworthy conduct. The idea is too gross and invidious to be entertained. But in such a case, if it should ever happen, the [ruling] so obtained … would, like all other fraudulent contracts, be null and void by the laws of the nations.

John Jay in Federalist No. 64

Avoiding a hydra

The mere necessity of uniformity in the interpretation of the national laws decides the question. Thirteen independent courts of final jurisdiction over the same causes, arising upon the same laws, is a hydra in government, from which nothing but contradiction and confusion can proceed.

Alexander Hamilton in Federalist No. 80

On the difficulties of legislating

The history of almost all the great councils and consultations, held among mankind for reconciling their discordant opinions, assuaging their mutual jealousies, and adjusting their respective interests, is a history of factions, contentions, and disappointments; and may be classed among the most dark and degrading pictures which display the infirmities and depravities of the human character.

James Madison in Federalist No. 37