ESFJ People of this type tend to be: active, friendly, and energetic; outgoing, affectionate, and talkative; concerned about others and careful to be polite and cooperative; realistic, literal, and conscientious; highly sensitive and easily hurt; organized, responsible, and conventional. The most important thing to ESFJs is their relationships and helping people in real, and practical ways.
How to Spot ESFJs: friendly, talkative, and concerned about others, even strangers
expressive voices, faces, and eyes
speak with great conviction, using plenty of personal, value words
decisive, enthusiastic, energetic
Tips for Communicating with ESFJs: Respect their feelings! Look them in the eye and respond to what they say
Mention points of agreement first
Be clear and specific - lay out the steps whenever possible
(From PersonalityType.com)
"The most important thing to ESFJs is their relationships and helping people in real, and practical ways."
So, this is no doubt why and how Slick Willie was/is able to "keep" Hillary -- he helps her with her ambitions, which far outweigh anything else, at least for her.