New caravan of migrants shrinks in size: Mexico officials

Officials renew calls for federal help as more asylum seekers arrive in U.S. cities. WATCH THE FULL EPISODE OF 'WORLD NEWS TONIGHT': https://bitly.ws/35iTm WATCH OTHER FULL EPISODES OF WORLD NEWS TONIGHT: http://abc.go.com/shows/world-news-tonight WATCH WORLD NEWS TONIGHT ON HULU: https://bitly.ws/35c6s #abcnews #worldnewstonight #caravan #migrants #border