[133] The Latin American nations were not fully satisfied, as the U.S. refused to renounce interventionism, though Hughes pledged to limit it to nations near the Panama Canal, and to make it clear what the U.S. aims were.[134]
The U.S. had intervened repeatedly in Mexico under Wilson, and had withdrawn diplomatic recognition, setting conditions for reinstatement. The Mexican government under President Álvaro Obregón wanted recognition before negotiations, but Wilson and his final Secretary of State, Bainbridge Colby, refused. Both Hughes and Fall opposed recognition; Hughes instead sent a draft treaty to the Mexicans in May 1921, which included pledges to reimburse Americans for losses in Mexico since the 1910 revolution there. Obregón was unwilling to sign a treaty before being recognized, and worked to improve the relationship between American business and Mexico, reaching agreement with creditors, and mounting a public relations campaign in the United States. This had its effect, and by mid-1922, Fall was less influential than he had been, lessening the resistance to recognition. 