There is no one easier to manipulate than a narcissist.
Trump is a simpleton sitting down for chess.
Step 1 - Show the stick. Rattle the saber. Raise the world's anxieties.
Step 2 - Lurch abruptly to the other pole. Show the carrot. Offer to relieve all of that anxiety.
Rush in to take premature credit and declare premature victory.
Trump is incapable of keeping himself from getting out far over his skis when there is personal glory to claim.
Trump is an infant being led across the floor to the candy bowl.
A reversal by North Korea and a refusal to completely denuclearize.
Trump left up on a pedestal of his own making facing the potential for humiliation.
He will hastily agree to a deal that is more symbolic than meaningful solely to save face.
The United States and South Korea will get the sensation of reduced risk with little practical reduction in North Korea's ability to do harm.
Kim Jong Un knows that.
The outcome here is entirely predictable - and now we get to watch it play out as if it is somehow a mystery.
You watch, by tomorrow, Trump will be talking about his candidacy for a Nobel Prize... all while Kim Jong Un smiles and laughs.