This week, the House Republicans get their chance to question Jonathan Gruber about Obamacare.
The bad news for politicians has been he's not a politician.
Unlike many academics, Gruber is not a jargon-spouting numbers cruncher: He’s a good “explainer-in-chief,” too, always ready with a plain-English translation of some wildly complicated effect of the health care law. There were plenty of reporters who turned to him as an authority not just on health economics, but on all things Obamacare.
If he's the guy to explain Obamacare, why shouldn't we trust his explanations that hurt it politically?