Donald Trump's promised war on drug cartels will stop Mexico from becoming a "narco state," US Vice President JD Vance insisted, as he hinted that Washington remained ready to take military action against the gangs. For in-depth analysis and a deeper perspective on Trump's draconian immigration crackdown and deteriorating relations both north and south of the border, FRANCE 24's Sharon Gaffney welcomes Ernesto Castañeda, Director of the Center for Latin American and Latino Studies and the Immigration Lab and Full Professor at American University in Washington, DC.