The problem is that now that the USSC has ruled, McC-F can always come back with a vengeance any time the political class decides it's had enough of being criticized.
Bush already bet the Republic when he signed it.
And lost.
Under the "charitable" scenario, Bush realizes this, and is willing to settle for a defanged McC-F-- to lessen and postpone the possibility of a full scale civil war.
As I said, it's a "charitable" scenario, not necessarily something that matches reality.
:-(