I'm not sure what he meant by the last bit (the country would be tired?) but he's right. Even though questioning has gone on for ages now, it's only yielded hints.
The email is definitely a concrete thing, and I think it will set off other revelations, even inadvertently from people trying to protect Obama. Witness Vietor's stupid answers, in which he said several times that Obama was not in the Situation Room at any point during the attack, and in fact, nobody really seemed to know where he was ("in the White House"). He was actually trying to defend Obama, and I think he only realized after he had said it that this made Obama look even worse. More such things will happen.
There’s no way the GOPe will impeach the first minority POTUS. They’re terrified of the fallout.
And the Democrats know it.