Obama’s Breathtaking Expansion of a President’s Power To Make War [TIME, 9/11/14]: President Obama hoped to repeal the Bush-era authorization declaring war on al Qaeda—instead he's expanded it without bound.

http://time.com/3326689/obama-isis-war-powers-bush/

Also see:

http://dish.andrewsullivan.com/2014/09/11/a-pragmatism-too-far/