El Universal reports that neither PAN nor PRI senators are happy with the nomination of Arturo Chávez Chávez as Mexico's top law-enforcement officer. Notably, Manlio Fabio Beltrones expressed disappointment that Medina Mora was let go, and said that only one of the senators he canvassed had heard of Chávez Chávez. However, Beltrones was also quoted saying that he was open to Chávez being "the jurist everyone was hoping for", which indicates that he will not oppose his confirmation. Officials (though not NGOs) who worked with him in Chihuahua seem to speak highly of him, but we'll see if that's enough to pacify those who take the nomination of an unknown as an insult.
Ricardo Alemán says that not only was the removal of Medina Mora a win for SSP boss Genaro García Luna, but it marks a wholesale recentralization of the PGR away from the attorney general and toward his office, which controls the federal police. In that context, a relative lightweight as attorney general is logical.