Following Duncan's career for many years, he has more national security and policy background than most running including a 1 term gov.
Also I don't want my candidate to be the great speaker, talker, etc.
We had one of those with Clintoon.
Giuliani has a reasonable chance to win the states of California, New York, and New Jersey.
Romney has some chance to win New York and New Jersey, and an outside chance to win the state of California.
McCain has a slight chance to win the state of California, but no real shot at New York or New Jersey.
Duncan Hunter has no shot at even winning California, much less New York and New Jersey.
A candidate who can't come close to delivering his own state adds nothing to Republican chances, regardless of his conservative credentials.
Has he ever had a staff meeting & led an administration - NO. He is just one of 435 members vying for attention.