But really, isn’t this his big conundrum – that he’s forced to campaign on a bunch of rehearsed nonsense in hopes that he can fool the jury (of voters) just long enough?
He can’t admit he was wrong about anything to do with the economy (especially the auto industry) because that would shatter his claim to be the economy candidate; he can’t admit that he’s changed any positions, because that would feed into his flip-flopper reputation; he can’t take any reasonable positions, because that would lose Republican primary votes; he can’t take wildly irresponsible positions, because that would lose the moderate votes (and backing) he needs. So, he works out his alibi for everything that he might get asked about, and sticks to it regardless of how skeptical the inquisitor becomes.
You can see why he wants to avoid public exposure. There’s a reason why most defendants don’t testify at their own trial.