No part of his argument, however, is so instructive to the student of American constitutional history as the observations upon the question of the constitutionality of the bill. He said that he was no advocate of refined reasoning upon the Constitution; that "the instrument was not intended as a thesis for the logician to exercise his ingenuity on; that it ought to be construed with plain good sense; and that when so construed nothing could be more express than the Constitution upon this very point." The clause to which he referred was that which confers upon Congress the power "to levy and collect taxes, duties, imposts, and excises; to pay the {16} debts and provide for the common defence and general welfare of the United States." Mr. Calhoun claimed that these words were to be interpreted as vesting in Congress the power to appropriate money for the common defence and general welfare of the country at its own discretion, both as to object and amount. He insisted that a generous interpretation of the power to raise and appropriate money was absolutely required, in order to avoid the necessity of placing a forced construction upon other powers. It was all in his best strain, and showed Mr. Calhoun still as the chief advocate of national union and national development. No other person seemed to equal him in breadth of view and purity of patriotism. [Sidenote: The opposition to the Internal Improvements Bill.] The measure met, however, with more opposition than the Bank Bill or the Tariff Bill had experienced. Two years of peace had cooled the ardor of the national spirit somewhat, and the people were dropping back into the narrow spheres of ordinary life and business routine. Moreover, the great hue and cry raised by the demagogues and the press over the bill, passed at the previous session, changing the pay of the members of Congress from a per diem of six dollars during attendance to an annual salary of fifteen hundred dollars, had made the members timid about the appropriation of money, and disinclined to obligate the Treasury to anything beyond absolutely necessary expenses. [Sidenote: Passage of the Bill by Congress.] Nevertheless, the great power and earnestness with which Mr. Calhoun addressed himself to the task of carrying the bill through its different stages were crowned with success. It finally passed both Houses, in a slightly modified form, during the last week of the Fourteenth Congress and of President Madison's second term. {17} [Sidenote: Veto of the Bill by the President.]