Abelardo Rodríguez Luján, commonly known as Abelardo L. Rodríguez was a Mexican military officer, businessman and politician who served as Substitute President of Mexico from 1932 to 1934. He completed the term of President Pascual Ortiz Rubio after his resignation, during the period known as the Maximato, when Former President Plutarco Elías Calles held considerable de facto political power, without being president himself. Rodríguez was, however, more successful than Ortiz Rubio had been in asserting presidential power against Calles's influence.

The president of Mexico, officially the president of the United Mexican States, is the head of state and head of government of Mexico. Under the Constitution of Mexico, the president heads the executive branch of the federal government and is the commander-in-chief of the Mexican Armed Forces. The current president is Andrés Manuel López Obrador, who took office on 1 December 2018.