Senators Clinton and McCain often do not do a very good job of controlling their emotions. Senator Clinton's facial expressions make it hard for her to mask what and how she is feeling.
Senator McCain's temper is well-documented.
I, and many Americans, probably prefer a leader who is cool, calm and collected under pressure. Senator Obama is this kind of person.
Being able to enter the zone is a valuable skills for all of us.
I have been helping people to get in the zone for many years. My new book deals with this subject.
Here is a link to amazon to get this book.
My site www.stayinthezone.com has lots of material on getting into the zone.