To secure his power, Díaz engaged in various forms of co-optation and coercion. He constantly balanced between the private desires of different interest groups and playing off one interest against another. Following the González presidency, Díaz abandoned favoring his own political group ("camarilla") that brought him to power in 1876 in the Plan of Tuxtepec and selected ministers and other high officials from other factions. Those included those loyal to Juárez (Matías Romero) and Lerdo (Manuel Romero Rubio). (Manuel Dublán) was one of the few loyalists from the Plan of Tuxtepec that Díaz retained as a cabinet minister. As money flowed to the Mexican treasury from foreign investments, Díaz could buy off his loyalists from Tuxtepec. An important group supporting the regime were foreign investors, especially from the U.S. and Great Britain, as well as Germany and France. Díaz himself met with investors, binding him with this group in a personal rather than institutional fashion. The close cooperation between these foreign elements and the Díaz regime was a key nationalist issue in the Mexican Revolution.