The fun part of looking at politicians handwriting is how do you say what you see diplomaticly and do you go over everything you find. Maybe I did see Romney's signature because I remember two of the signatures were illegible and Huckabee's first name was so illegible I had to look up his name and then Huckabee became a mere thread. As we all understand the things that make a good diplomat and politian also make a good con-man.
Hillary very much wants to be known as a woman in her own right, capable, determined, and well qualified. While she would be happiest if she could run on her own without help or interferrence from her husband she realizes that is impossible so she will profit in any way possible from her experiences in the White House. She is determined and direct to the point of bluntness. Needs someone to handle the small details she finds iritating and keeps most people from getting too close.
Obama's signature definately shows he was Arabic taught. Not knowing the copybook form for Arabic I am somewhat at a disadvantage but again there is threading which slurs the forms. Any threading is an indication of not wanting to be pinned down, to escape responsibility when things go wrong, to hide the personal self, and of course speed of thought and action. He could be very creative in his dealings with others.
McCain's signature was an autograph so he may not be as up beat and optimistic as it appears. He, however, has great focus. With only eight letters of the alphabet to work with I can say he is able to keep secrets his own as well as our countries. He pays attention to details, has a lot of mental activity and a wry sense of humor.