War on Drugs

Can anybody tell me what President Obama did to slow down the drug cartels in Mexico? According to the Associated Press, today they killed 9 U.S..citizens in western Mexico. President Trump is trying to get control of the border and has now offered help to eliminate these monsters if Mexico requests help. It's in our best interest as a nation to put an end to this. The Mexican people would love to stay in their own country but are fleeing due to this violent corrupt world. Maybe that's why we haven't seen any action in eight years there because fleeing migrants bring votes, and that's good for the liberal cartel.