President Trump is sending a message to Latin American countries that if they want US help in fighting drug cartels, they need to be willing to use their own military. He launched the “Shield of the Americas” security initiative with conservative leaders from the region, excluding major powers like Mexico and Brazil. The White House aims to take a dominant role in combating regional drug trafficking.
Source: https://www.wsj.com/world/americas/trump-urges-latin-american-allies-to-use-military-against-drug-cartels-84c11dee