And dont forget in Trumps first term mexico and the u.s investigated "fast and furious" program which was CIA & Obama administration selling military grade weapons to the cartels, they are just sitting on this case, at some point i think its going to go public.
It's pubic knowledge that Obama invoked executive privilege (for his first time) to shield Eric Holder (Leader of Fast and Furious) from congressional investigation.
The investigation came after a federal agent was killed by one of the guns Eric Holder 'let walk across the border". They lost track of an estimated 2000 firearms to Cartel.