
Very surprised this is coming from Politico. Pretty much spot on, go read the explanations of the points here.
1. He’s desperate.
2. He’s willing to gamble — bigtime.
3. He’s worried about the political implications of his age.
4. He’s not worried about the actuarial implications of the age issue.
5. He’s worried about his conservative base.
6. At the end of the day, McCain is still McCain.