If part of the presidential package is character, then Bob Herbert's analysis of Senator John McCain's character is required reading.
Highlights: McCain's frequent mistakes when speaking about international affairs. His notorious, vicious temper that gives even his fellow Republicans pause. His fanaticism towards the war in Iraq, insisting on defining it as a matter that can and must be "won".
McCain has even stated as recently as 2003 his belief that the Viet Nam war could have, and should have, been won. If John McCain doesn't even know know that one of the classic blunders is getting involved in a land war in Asia, then he truly lacks the capability to lead our nation (and he needs to watch the battle of wits scene from The Princess Bride).