US vulnerability to dwindling Mexican oil exports is growing. The US-Mexican relationship in oil has long been a collaborative one. Over the early part of this decade, as US demand grew, so did Mexican exports to the US mainland—a relationship author Jeremy Martin calls an “oil symbiosis made in heaven.” Since 2007, however, Mexican production has been falling. An uncomfortable redefinition of this symbiotic relationship may be unavoidable in the near future if Mexico’s oil majors cannot sort out their own problems.