ZUBRIN UPDATE: In response to our podcast, senior McCain policy advisor Doug Holz-Eakin emails:

Obviously, we agree with flex-fuel vehicles. From McCain’s energy speech to CSIS in April:

“We need not wait for another age, in which science fiction becomes every day reality. Flexible-fuel vehicles aren’t futuristic pie in the sky. We can easily deploy such technology today for less than $100 per vehicle; and we must develop the infrastructure necessary to take full advantage.”

Perhaps some of the other candidates will want to weigh in?

UPDATE: Some thoughts from Autoblog.