Why doesn't the U.S government get more involved with drug cartels in Mexcio?

Drug cartels obviously are very dangerous and a cancer to whichever societies they are spread in. And since Mexico is an immediate neighbor to the United States, it is potentially our problem given that we are a big market for them and they are right next to us.

Why don’t we go in ( as we do in Afghanistan or Iraq…where we go in to “save” people) and solve this problem? I am not supporting war but of course the Mexican drug problem is grave and requires immediate attention.