“Alito is signaling that he would answer clearly and directly.”
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I don’t see it that way. Note that he said that is “different from the level of proof that is needed to name somebody.” That is effectively saying that he’s not going to finger anyone.
Doing so would make him a pariah and an outcast in DC.
I see him more as prodding for a more fuller investigation and let the process expose the leaker.
We have different views on this and that’s fine. That’s what makes the world go around. ;)