Green, however, continued to edit it in the Calhoun interest until 1835, and gave vigorous support to that leader's nullification views.
On the death of John C. Calhoun in 1850 the state, under the leadership of Jefferson Davis, began to rival South Carolina as leader of the extreme pro-slavery States' Rights faction.
Henry Clay, the speaker, appointed him a member of the Committee on Foreign Relations, of which John C. Calhoun was chairman, and for some forty years these three constituted a great triumvirate in American politics.
The tariff of 1828 aroused bitter opposition in South Carolina, and called from Vice-President Calhoun the statement of the doctrine of nullification which was adopted by the South Carolina legislature at the close of the year and is known as the South Carolina Exposition.
The rejection, ostensibly attributed in large part to Van Buren's instructions to Louis McLane, the American minister to England, regarding the opening of the West India trade, in which reference had been made to the results of the election of 1828, was in fact the work of Calhoun, the vice-president; and when the vote was taken enough of the majority refrained from voting to produce a tie and give Calhoun his longed-for "vengeance."