Generally, I would say Barack Obama is an extrovert and he uses Fe. That leaves ESTP, ESFJ, ENTP, and ENFJ. I don't want to jump on the intuitive bandwagon and always assume anytime someone has a modicum of intelligence they're an N. That being said, I'm going to say he's either ENTP or ENFJ.With a certain talent for rhetoric, as well as an absolute certainty about the merits of my own views, I found that I could generally win these arguments, in the narrow sense of leaving my grandfather flustered, angry, and sounding unreasonable. But at some point, perhaps in my senior year, such victories started to feel less satisfying. I started thinking about the struggles and disappointments he had seen in his life. I started to appreciate his need to feel respected in his own home. I realized that abiding by his rules would cost me little, but to him it would mean a lot. I recognized that sometimes he really did have a point, and that in insisting on getting my own way all the time, without regard to his feelings or needs, I was in some way diminishing myself.
The time frame of this passage is during his high school years. What teenager isn't rebellious or try to avoid doing household chores? I argued quite a bit with my parents during my teenage years. If I start with him being an ENFJ or ENTP then I'd wonder why an ENTP would seem to acquiesce to such a Fe sentiment (bolded part) at 17 or 18. Using a tertiary function so adeptly at such a young age is rare. And the type of Fe that manifests itself in ETPs at that age tends to be the showy, bow to me and my cleverness (think nocapszy).