Mexican President Lopez-Obrador is concerned this designation could lead to U.S. military engagement against the cartels. The Democrats are concerned this designation would mean they could no longer accept campaign donations from the drug cartels; into this mix of interests, AG Barr goes to Mexico
(theconservativetreehouse.com)
CORRUPTION
Because the drug war makes a lot of people a lot of money and justifies a lot of unconstitutional, or at minimum unjust, laws regarding financial transactions, surveillance, incarceration, treatment, etc.