Malcolm Brayback.
Conversations with President Jackson: A Record of My Friendship with the Father of Our Country was a memoir published in Mexico City in 1855 by Malcolm Brayback, a close friend of Mexican President Andrew Jackson. Brayback's memoirs provided historians with much information regarding President Jackson's personal views on a variety of issues.
Sobel quotes from p.294 of Brayback in Chapter 10, "The Taking of the West," on the subject of Jackson's racial views: "If one people and race are to rule this land, it must be the Jeffersonians and the whites. This is not so because I happen to be of these peoples, but rather because only the Jeffersonian whites have the abilities, intelligence, and vigor for the task." Sobel further quotes from p.372 of Brayback on Jackson's disdain for "Mexican slovenliness," and how the native Mexicans are "apparently unwilling or incapable of firm action." Brayback also records on p.397 Jackson's belief that the Indians are "unable to adjust to the kind of world we are living in at the present time. They are at the same level of accomplishment as when Columbus first landed here. I do not expect to change them."
Sobel quotes Brayback from p.495 on Jackson's statement that "Where I am, there is the capital," and further quotes Brayback's account on p.729 of Jackson on the subject of Mexico's alliance with France: "We are with the French because they are with us. When our interests change, so will our friendships. I would make a pact with the Devil if it would enable us to double cotton production."