Leftist Mexican opponents of the Díaz regime, such as Ricardo Flores Magón and Práxedis Guerrero, went into exile in the relative safety of the United States, but cooperation between the U.S. government and Díaz's agents resulted in the arrest of some.
Venstreorienterede kritikere af regimet som Ricardo Flores Magón og Práxedis Guerrero gik i eksil i relativ sikkerhed i USA, men samarbejde mellem USA's regering og Díaz' agenter førte til anholdelse af nogle af dem.