Among the multitude of migrants waiting in Mexico to get asylum in the United States are thousands of Africans boldly demanding passage into the country. They are far more coordinated than their Central American caravan counterparts and have formed an official organization to spread their message and advocate on their behalf. The group accuses Mexican authorities of discrimination and racism and is ordering Mexico to grant visas that allow them to continue their trek north to seek “protection” in America. For about three months the Africans have been holed up in Tapachula, in the southeast Mexican state of Chiapas bordering...