A new migrant caravan started heading toward Mexico City last week, criticizing a lack of attention from federal officials as they departed Tapachula, Chiapas. The participants are primarily foreigners from Haiti, Venezuela, Cuba and Central America who were assembled in Mexico’s southernmost state, where they felt trapped with no prospects for work. Comprising approximately 800 people, the caravan had reached Pijijiapan — a distance of 133 kil…