NT's are the types who put the most stock into being competent. Keirsey states that NTJ's enjoy organizing and coordinating, and mentions how they often become leaders. However, while that is certainly true, in many instances Rationals exercize a type of leadership that may only prove adequate at certain levels. It is not the typical kind of leadership expected in common situations.
Rationals have vision, strategy, resilience, independence and competence. On the other hand, Rationals are not especially concerned about what people think about them, social conventions, hierarchies, and people's feelings. In other words, Rationals are not political.
I think that the Rationals attempting to become political end up downplaying their strengths in the process. The political strength of Rationals lies in the ability they have of not getting swayed by people's opinons. They must win people over through their integrity, competence and strength.