Ashton Carter actually said...

I urge you to pass the President's AUMF because it provides the necessary authority and flexibility to wage our current campaign.

I believe the President's AUMF does both, and I urge Congress to pass it.

To me, this is a sensible and principled provision of the AUMF, even though I cannot assure that the counter-ISIL campaign will be completed...

Military means, however, will not be sufficient to counter ISIS.