Biggest- in-GNP Latin American country is

                     Drug Cartel "Nation" by far, far, far over all the others.

-Large group of unaccompanied minors and families apprehended on April 7 near Hidalgo, Texas.  Photo: U.S. Border Patrol

4-10-18     “What is going on is people don’t just happen to come into the United States,” the Texas governor explained.  “They get here by the drug cartels and by the coyotes who bring them across.  Every time we have increased the forces on the ground there has been a decrease of the cartel activity and coyote activity because they realize they will be losing money.  Part of our job is to put these cartels and coyotes out of business.  Whenever we are able to ramp up the support on the ground, it puts them out of business, and it’s going to make the border a far more secure place.”   http://www.breitbart.com/texas/2018/04/10/border-patrol-reports-large-groups-migrants-crossing-texas/
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5-13-14    Americans spent roughly $1 trillion on illegal substances between 2000 and 2010, a new report compiled for the White House shows.  The report, published by the RAND Drug Policy Research Center for the Office of National Drug Control Policy, tracked the total expenditures, consumption and number of users of marijuana, cocaine (including crack), heroin and methamphetamine.  While the demand for certain drugs varied over the course of the decade, overall spending on illegal substances remained consistent at roughly $100 billion per year.   https://www.huffingtonpost.com/2014/03/13/americans-trillion-dollars-drugs_n_4943601.html

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11-7-2012     if the Mexican drug cartels were a sovereign nation, they would qualify to be part of the G-20, ahead of Indonesia (GNP: $845 billion) and behind South Korea (GNP: $1.1 trillion).
   In 2010 Wachovia Bank was found to have laundered $378,400,000,000 before it was caught.  After federal prosecutors started criminal proceedings against the bank, it agreed to hand $110 million over to federal authorities, for allowing banking transactions with proven connections to drug smuggling operations.  And the same bank subsequently paid the government a $50 million fine for failing to monitor cash used to ship 22 tons of cocaine.  In other words, the bank paid $160 million to make the case go away.  No bank official was ever charged with a crime, and the monies ended up dispersed throughout the United States. Wells Fargo acquired them in 2008....

The result is that, if these funds were seen as foreign direct investments, Mexican drug cartels would surpass Switzerland, the United Kingdom and Japan as having a stake in the U.S. economy.  Once the money has entered the U.S. banking system, they can purchase homes, airplanes, businesses and weapons.      https://www.quora.com/Where-do-drug-cartels-invest-their-billions