I hope he goes after the Syrian terrorists. (1) Obama supports them, so we know they are America's enemies, and (2) that is less risky than bumping heads with a NATO member. I'd rather not sit through the whining and stern protests that downing a few NATO aircraft would lead to.
Bet he sends in his special forces groups to find those people rather than a ground assault because then Turkey might declare war against Russia which in itself wouldn’t be a bad idea. Take out that Muslim government.