Biden said in the VP debate that Obama wrote a letter to the Secretary of the Treasury. Wow ... that sure made a difference.
I did find a letter from 2007 here.
A quick read tells me that it's about a whole different topic; that is keeping people in foreclosed homes.
So this is the one "fact" that Biden didn't misstate?
He must have taken care to carefully memorize this because they needed an unprovable fig leaf.