In 1835, there was a drastic shift in the Mexican nation. The triumph of conservative forces in the elections unleashed a series of events that culminated on October 23, 1835, under a new constitution, after the repeal of the federalist Constitution of 1824. Las Siete Leyes (Spanish: [las ˈsjete ˈleʝes]), or Seven Laws were a series of constitutional changes that fundamentally altered the organizational structure of Mexico, ending the first federal period and creating a unitary republic, officially the Mexican Republic (Spanish: República Mexicana). Formalized under President Antonio López de Santa Anna on 15 December 1835, they were enacted in 1836. They were intended to centralize and strengthen the national government. The aim of the previous constitution was to create a political system that would emulate the success of the United States, but after a decade of political turmoil, economic stagnation, and threats and actual foreign invasion, conservatives concluded that a better path for Mexico was centralized power.