Reports The Washington Post's Greg Sargent:
The internet is alive with speculation that the secret source Harry Reid claims to have on Mitt Romney’s tax returns is Utah industrialist Jon Huntsman Sr. He is the founder of Hunstman Corporation and the father of the former GOP presidential candidate — and the speculation is based on the fact that his profile fits with much of what we publicly know about Reid’s presumed confidante.
But I just got off the phone with Huntsman, and he confirmed to me that he is not Reid’s source.
However, in a move that could be significant, Huntsman forcefully called on Romney to release his tax returns. This matters, because Huntsman is a longtime backer of Romney — he has long been close to Romney; he supported his early campaigns; he was the national finance chairman of Romney’s 2008 presidential campaign; and he has raised a lot of money for him over the years. (He backed his own son in the latest GOP primary.)