States to protect their individual rights.[162] But it is obvious that, for this purpose, the question had lost its real importance, when an equal number of Senators was assigned to each State; since, upon every measure that can touch the separate rights and interests of a State, the unanimity which is certain to prevail among its representatives makes the vote of the State as efficient as it could be if it were required to be cast as a unit, while the chances for its protection are increased by the opportunity of gaining single votes from the delegations of other States. These and similar considerations ultimately led a large majority of the States to prefer a union of the plan of an equal number of senators from each State with that which would allow them to vote _per capita_.[163] The number of two was adopted as the most convenient, under all the circumstances, because most likely to unite the despatch of business with the constant presence of an equal number from every State. With this peculiar character, the outline of the institution went to the committee of detail. On the consideration of their report, these provisions, as we have seen, became complicated with the restriction of "money bills" to the House of Representatives, and the choice of the executive. The mode in which those controversies were finally settled being elsewhere stated, it only remains here to record the fact that the particular nature and form of the representation in the Senate was generally acquiesced in, when its relations to the other branches of the government had been determined. The difference of origin of the two branches of the legislature made it necessary to provide for different modes of supplying the vacancies that might occur in them. The obvious way of effecting this in the case of a vacancy in the office of a representative was to order a new election by the people, who can readily assemble for such a purpose; and the duty of ordering such elections was imposed on the executives of the States, because those functionaries would be best informed as to the convenience of their meeting. But the State legislatures, to whom the choice of senators was to be confided, would be in session for only a part of the year; and to summon them for the special purpose of filling a vacancy in the Senate might occasion great inconvenience. The committee of detail, therefore, provided that vacancies in the Senate might be supplied by the executive of the State until the next meeting of its legislature.