Graham has innoculated himself for a future seat on the SCOTUS.
SCOTUS isn't his element. He's a trial attorney and a showman, not a behind-the-scenes scholar. If he can't be president, he wants to be governor of South Carolina, where he can draw the media and crowds.
This is a vintage Lindsey Graham closing argument. I've heard him do it in court to great effect. He disarms his opponents, makes them feel at ease,then proceeds to eviscerate their points and leaves only his own standing. He's the best I have ever witnessed at it.
I don't know how many FReepers know it, but Lindsey is already a judge. He is reserve Air Force colonel assigned as a back-up judge on the Air Force Court of Criminal Appeals. I think that probably about as much judging as he's ever going to want to do. That's my guess anyway.