Answer
Porfirio Díaz, the president at the time, was responsible for ordering the arrest of Francisco I. Madero following the 1910 election. Madero, a vocal critic of Díaz's authoritarian rule, had run as the opposition candidate and claimed victory in the election. However, Díaz refused to acknowledge his defeat, had Madero arrested, and annulled the election results, leading to widespread outrage and the outbreak of the Mexican Revolution.