During a recent NBA on TNT broadcast, Marv Albert mentioned that Obama could recite the entire Philly 76ers roster. Sounds like an Si dominant. isfj, to be exact. Doesn't sound like something an enfj would care to demonstrate outright.
I've never personally felt he's empathetic/enthusiastic enough to be enfj.
Agreed or understandable for most of them.
These ones I'm not so sure about:
Herbert Hoover- Close enough, but I think ENTJ. A good example of a likeable ENTJ, actually. (Until the Great Depression), he was known his entire career for his creative efficiency-building and streamlining skills. Anyway, glad to agree that he's NTJ.
I'd swap around some of the INTJs and ISTJs, but I guess I'll leave that.
Abraham Lincoln- I don't think ISTJ, but it's not clear what. He's a confusing man.
Martin van Buren- Maybe ESTP, being described as a great "salesman." ESTJ may be a point, though.
James Polk and John Tyler- I guess it depends on how you interpret their motivation for doing what they did (or maybe you looked up biographical information). What's your reasoning here?
William Howard Taft- INFJ? Wow, how you do explain that?
Blatant Ni. Te can be seen if you don't actually swallow the Fe-happy media hype.
George W. Bush- ENFJ
Bill Clinton- ENTJ
No. The guy was extremely detail-oriented, charismatic, touchy-feely, and as you probably know he loved, loved, loved to fuck.
George H. W. Bush- ENTJ(?)
Too quiet and reclusive.
John F. Kennedy- ENTJ
Cuba, anyone? Johnny boy was reckless, it almost destroyed the world.
I think you're overtyping N. There have certainly been N presidents aplenty, but there have been just as many Sensor presidents. The public actually likes sensors better, the US itself having a deeply Sensing culture.