It may take an Iraq-style ‘surge’ to save Mexico from the drug-cartel insurgents. In Mexico, all the legs of the stool are cracked. Prisons are out of control. Municipal authorities cower before the cartels. The “impunity rate” — that is, the likelihood that crimes will not be punished — is just shy of 99 percent. This is not business as usual for Mexico. Either the country is going to get a grip on its crisis of institutions and its deficits in leadership or it is going to increasingly resemble Iraq before the surge, albeit with drug money taking the place of religious fanaticism. Donald Trump might not care about Mexico, but you should. Even if we build a wall, no crisis will ever respect a border.