=== But as a political symbol, the incident may have greater endurance. Senators put up with a lot of evasion and deceit from the executive branch, but one thing they will not tolerate is being explicitly left out of the loop. ===

They have tolerated it pretty well since 2001 (if not 1998), especially the Republicans. And since Republican assistance would be needed to take this on I wouldn't hold my breath.

sPh