This is interesting...the following article has a detailed analysis of presidential candidates. (I know this is Keirsey rather than Socionics, but still this is interesting...)
Using Keirsey's system, it builds detailed cases for:
Hillary Clinton: ESTJ
Bill Clinton: ESFP
Barak Obama: ENFP
John McCain: ESTP
So, if we look at what are widely considered the Socionics types for these people, we have J and P flipped...not the well-known "J/P switch" for introverts...but actually flipping it for extraverts.
(Note...I'm relying here niffweed's typing of McCain as LSE and on those people who see Hillary as SLE, as opposed to LSI.)