On 5 October 1910, Madero issued a "letter from jail," known as the Plan de San Luis Potosí, with its main slogan Sufragio Efectivo, No Re-elección ("free suffrage and no re-election").
5. oktober 1910 skrev Madero et "fængselsbrev", den såkaldte Plan de San Luis med det centrale slogan: Sufragio Efectivo, No Re-elección (Fri valgret og intet genvalg).