Two years ago, Mexican journalist Mario Gomez Sanchez went to police and told them he was afraid for his life.Gomez, who worked at a newspaper in the southern state of Chiapas, said he had been threatened on Facebook by the driver of a member of Congress whom Gomez had accused of corruption in a recent news story.According to the press freedom group Article 19, which interviewed Gomez about the threats at the time, the driver vowed to “load” Gomez with bullets. “I’ll blow your head off,” the driver reportedly . . .