Amid rising border tensions, the U.S. faces an invasion of foreign criminal gangs exploiting lax laws and migration. Chinese mafias dominate the illegal marijuana market, using slave labor and causing violence. Venezuelan gang Tren de Aragua and major Mexican drug cartels also expand, bringing theft and drug trafficking. Meanwhile, migrants linked to ISIS add a potential terror threat. This complex web of crime and trafficking showcases a dangerous blend of organized crime and weak immigration ...