I hate the way I wrote my last post to this thread, so I deleted it.
"If there’s one thing that is consistent with Obama throughout his life, it’s his desire to see all sides of issues. This and his desire to be fair, especially, indicate that he is primarily a 9-Peace Seeker."
The problem with many type analyses of presidents is that the analysts fail to over come their biases regarding the president. For example, many enneagrammists of a liberal or democratic bias think or thought that Reagan was a type 8. But from the objective standpoint of history, that belief is rendered ludicrous almost on its very face.
The same tendency toward bias is found with the author of the article in the OP. The idea that Obama seeks to see all sides of an issue and to be fair is not borne out in his one-sided political method for which he has been roundly criticized. Obama has had every opportunity to be fair with Congress; instead, he makes every effort to bypass Congress.
One thing that IS consistent with Obama is his quest for identity that comes from his childhood abandonment and sense of not belonging. Even after his first presidential race, he stated that he had no values-identity before the race began (I'm looking for the exact quote), and that it was during the race that he found out where he stands on many issues. But this came, not through any kind of internal values-pondering (Fi), but through whichever voter base his campaign was targeting.
In college in Hawaii, Barry Obama chose to hang with the outliers of society: doing drugs, playing loud music, and burning cigarette holes in carpets. This is without a doubt his rebellion phase, although rebellion has its psychological roots in something else, and is methodological of the average type 4 "rebel without a cause."
If say Barry was a type 3, I would expect that he would be well-versed in societal values from a very young age. Perhaps he would have been if he was not from a broken, non-traditional family. But given the values-vacuum young Barry found himself in, and lacking any firm moral foundation either internally or externally, Barry just sort of drifted into whatever groups would accept him. He's also stated that drug use helped him to escape from his internal compulsion to find himself by seeking out his roots. Theoretically, this may be indicative of a 3-wing deteriorating to 9, but it does not mean that Barry was or is a 9. Rather, the 4's quest for values is indicative of a 4 trying to integrate to 1, or as Riso stated in Personality Types, moving "from the world of subjectivity [from which Barry was trying to escape] to the world of objectivity" which would have been hindered by his drug use.
As for MBTI, I'll go with INFJ, in an Ni-Ti loop. And 4w3, a conflicted type that at once seeks both individuality and external success.