As they've always done.

Rephrased: the worst we can do in a negotiation is as good as anything we've ever gotten out of the DPRK. 

I'm tempted to say that the fact a meeting is happening at all is, in itself, proof that the policy of increased pressure is working. I mean if it wasn't, why bother with the charade? This part of the policy worked. Any deal we make is a new ballgame, and we're gonna have to make sure those concerns are addressed. I know lots of ya don't have a lot of faith in the "Art of the Deal," but surely we can at least give the Mad Dog a chance to draw up something that works before we declare it a futile endeavor? We haven't even [i]sat down[/i] yet, nothing's impossible.

I think Kim Jong-Un has self-interest. That oughta be all the leverage we need.