Let them have their Caliph. Screw with us, kill them. That goes for any threat to our superior way of life...yes you whiny blood-sucking socialists, it IS superior. Go Dresden on them, collateral damage be damned. I'm sick of PC warfare. I vote to re-build our stockpiles of napalm.
Pull out of the Middle East cesspool with the plain wording that any nation that harbors terrorists will have their leadership targeted first, then their populace in case we miss some.
It worked on Germany and Japan, it would work on Syria, Saudi Arabia, and any non-aligned threat. We go all out or we don't go at all...and that includes tactical nukes.
Just read that the wings of the F-35 are built in Turkey. Hope that is not the only source.
While rebuilding our stock piles of napalm, we need to rebuild stock piles of cluster munitions or buy the really neat ones Russia makes as well as investing in new thermobaric warhead tech.