If he disappeared, would he be worth abandoning nuclear weapons to his daddy? Granted, it would be the greatest "Mission: Impossible" ever done, but what price is worth stopping nuclear proliferation?
And, of course, once we have him, we could use the most subtle and amazing technologies ever devised to, shall we say, change his mind about things? Perhaps turn him into "The McLean, Virginia Candidate".
Stick a shark fin on him and toss him overboard near those Japanese whalers hunting near New Zealand. If anything, they'll be able to smelt some blubber off him and run the boats engines off it for the trip home...