La Jornada – Sunday marked the start in 16 states of campaigning for the June 7 elections in which governorships in Baja California Sur, Campeche, Colima, Guerrero, Michoacan, Nuevo León, Querétaro, San Luis Potosi and Sonora will be elected.

http://www.jornada.unam.mx/ultimas/2015/04/06/guerrero-retencion-de-funcionarios-electorales-nubla-inicio-de-campanas-5693.html