The national debt was the source of more complicated questions. It was composed, on June 30, 1866, of a variety of loans carrying five different rates of interest and maturing in nineteen different periods of time. Parts of it had been borrowed in times of distress at high rates; but after the struggle was successfully ended, the credit of the government was good, and enough money could be obtained at low interest charges to cancel the old debt and establish a new one with the interest account correspondingly reduced. Hugh McCulloch and John Sherman as secretaries of the treasury were most influential in accomplishing this transition, and by 1879 the process was completed and a yearly saving of fourteen million dollars effected. Differences of opinion concerning the kind of money with which the principal of the debt should be paid brought this matter into the field of politics. When the earliest loans had been contracted, no stipulation had been made in regard to the medium of payment. Later loans had been made redeemable in "coin," without specifying either gold or silver; while still later bonds had been sold under condition that the interest be paid in coin, although nothing had been said about the principal. There was considerable demand for redemption of the bonds in paper money, except where there was agreement to the contrary, although the previous custom of the government had been to pay in coin. The proposal to repay the debt in paper currency, the "Ohio idea," gained considerable ground in the Middle West, as has already been explained. In the campaign of 1868 the Democratic platform advocated the Ohio plan. Some of the Republicans, like Thaddeus Stevens, agreed with this policy; some of the Democrats opposed it--Horatio Seymour, the presidential candidate, among them. Nevertheless the Democratic platform committed the party to payments in greenbacks unless express contract prevented, while the Republicans denounced this policy as "repudiation" and promised the payment of the debt in "good faith" according to the "spirit" and "letter" of the laws. The credit of the government was highly benefited by the payment of the debt in gold, yet the bonds had been purchased during the war with depreciated paper, and gold redemption greatly enriched the purchasers at the expense of the remainder of the population. It is hardly surprising that the debtor classes were not enthusiastic over this outcome. The Republicans on being successful in the election and coming into power, carried out their campaign promises and pledged the faith of the country to the payment of the debt in coin or its equivalent.