I noticed the more he was pressed, the more wishy-washy he became on the subject... I think they (congress/senate) are in a corner and not sure what to say since the President is coming out and saying: yes, we did it and whoever spilled the beans has put us all in danger...
Well, considering the fact that only a handful of people could have known about it -- and considering the fact that I'd bet my house that the White House KNOWS who those people are -- they better be V E R Y careful.
He looks like he's ready to name some names.