sentences:  The party was created with the intent of providing a political space in which all the surviving leaders and combatants of the Mexican Revolution could participate and to solve the grave political crisis caused by the assassination of President-elect Álvaro Obregón in 1928.Although Calles himself fell into political disgrace and was exiled in 1936, the party continued ruling Mexico until 2000, changing names twice until it became the PRI.The PRI maintained absolute power over the country for most of the twentieth century