unless there are criminals that have been caught escaping directly into mexico from the us or a plot was discovered directly linking americans d rugs rings here to mexico or other illegal expatriot crimes the u.s. dont really have the authority to fight d rugs in mexico since its mexico's business to resolve till u.s. gets permission from mexico to resolve the problem and find any and all perpetrators
the u.s. may fund it thats true but they still need a damn good reason to still go into mexico because they still have limitations as to what they can cant do without cause otherwise it'd be like the whole wmd business except on a way smaller scale and not taken as seriously
No cause the US funds the drug wars