One of the major compromises in the Constitutional Convention was between the small states and big states. The small states wanted each state to have the same number of representatives in Congress. The big states wanted representation based on population.
In creating a new U.S. government, it was "A. The Virginia Plan" that proposed that the elected members of lower house would select the members of the upper house, since this would have favored the larger states.
In Federalist No. 78, Hamilton said that the Judiciary branch of the proposed government would be the weakest of the three branches because it had "no influence over either the sword or the purse, ...It may truly be said to have neither FORCE nor WILL, but merely judgment." Federalist No. 78 quotes Montesquieu<span>: "Of the three powers [...], the judiciary is next to nothing." There was little concern that the judiciary might be able to overpower the political branches; since Congress controlled the flow of money and the President the military, courts did not have nearly the same clout from a constitutional design standpoint. </span>
It was primarily "<span>d. the vulnerability to invaders from the north", since the Mongol territory was rapidly expanding--making the Mongol warriors all the more powerful. </span>