It has been reported that Donald Trump had expressed his view that the drug war is a failure, and that it is best to legalize drugs and thus end the cartels. He had done so both in the 1990's as a private citizen and in while campaigning for President, even though in the latter case he was more reserved, focusing only on the marijuana aspect of it.
What he decides to do based on these views as President remains to be seen but if he actually moves to end the massive disaster known as the drug prohibition, or drug war that would certainly be change that couldn't come too soon.
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http://livingresistance.com/2017/02/22/president-trump-legalizing-drugs-will-end-violent-cartels/