A declining American military empire relies on increasingly flimsy legal justifications to attack foreign countries without provocation. Last year, Obama asserted that the 2001 Congressional Authorization for the Use of Military Force authorized him to launch airstrikes against ISIS in Iraq and Syria, even though the AUMF related to Al Qaeda, an enemy of ISIS. Now Obama wants Congress to give him retroactive authorization, even while claiming he was right last year. Why not go even further to stretch logic?