The United States would use the rights granted under the Mallarino-Bidlack Treaty as a justification for its military interventions in Latin America through the remainder of the 19th century. Like many Southerners, Polk favored low tariffs on imported goods, and initially sympathized with John C. Calhoun's opposition to the Tariff of Abominations during the Nullification Crisis of 1832–1833, but came over to Jackson's side as Calhoun moved towards advocating secession. Thereafter, Polk remained loyal to Jackson as the President sought to assert federal authority. Polk also ordered Commodore Conner to allow Antonio López de Santa Anna to return to Mexico from his exile in Havana, thinking that he would negotiate a treaty ceding territory to the U.S. for a price. Polk sent representatives to Cuba for talks with Santa Anna.