If you do nothing else, read George Will's Sept 23 editorial in the Washington Post. McCain's response to the financial crisis convinced me that he is not of presidential caliber. When a conservative like Will comes to the same conclusion, it is something worth noting. Personally, I think Obama's response was better than Will gives him credit for, but he concludes:

Conservatives who insist that electing McCain is crucial usually start, and increasingly end, by saying he would make excellent judicial selections. But the more one sees of his impulsive, intensely personal reactions to people and events, the less confidence one has that he would select judges by calm reflection and clear principles, having neither patience nor aptitude for either.

It is arguable that, because of his inexperience, Obama is not ready for the presidency. It is arguable that McCain, because of his boiling moralism and bottomless reservoir of certitudes, is not suited to the presidency. Unreadiness can be corrected, although perhaps at great cost, by experience. Can a dismaying temperament be fixed?

McCain has made a number of serious errors in judgment that in my mind make him unsuitable for the presidency. His agreeing to personal attacks of the most vicious kind with no relation to the truth are the worst and it was seen once again in his attack on Cox, the Chairman of the SEC. His ludicrous choice of Palin, who has no qualifications for high national office, was certainly another. His repeated errors in judgment in foreign affairs are still another. This was the final straw for anyone with a willingness to look at the issues.