Obama didn't write an article for the Harvard Law Review - the only editor/president (the title has changed over time) not to do so.
However, Obama did write a case note at 103 Harv. L. Rev. 823 (1990).
There's a huge difference between an article and a case note. An article represents independent thought on a topic and discusses how the law should be changed, or may apply given social or technological changes, and cites a large number of cases on point or for analogy. A case note is simply a notice of an important decision by a court and an explanation of the decision.
Obama wrote about an Illinois court holding that unborn children have no legal right to sue their mothers for damage sustained during pregnancy, from such things as alcohol or illegal drugs.
I looked up that case note and I can’t find anything that authenticates it as his own work. The only claim I found is that, in 2008, some Politico writers claim to have received a letter from Harvard Law Review stating that it was his work. The letter further stated that it was policy to maintain internal records of authorship of the unsigned items published. Does anyone know if there was any other proof or if that Harvard Law Review letter was ever published?
I can see where Harvard would have a vested interest in covering up the embarrassment of being so far in the tank over white guilt and multiculturalism that they would be willing to falsify his authorship. Otherwise, his appointment as President of the Harvard Law Review is not supported by a shred of scholarship or any other measurable means of indicating why 0 got that ultimate plum appointment. In other words, a sham through and through. Kind of like everything else about this jerk in the WH.