If by "low energy" you mean calm, rational and interesting in discussing issues as opposed to being an aggressive bully, then "low energy" is good except for the fact that in this election being angry may get you votes.
On the other hand Bush's remark that "you can't insult your way to the presidency" is a little problematic. Remember how vicious his brother was toward McCain? Is he willing to apologize for that?
Bush is not interested in discussing issues. He's interested in discussing vague talking points about bad policy.
