When guests arrive for the rescheduled White House Correspondents’ Association dinner on Friday at Washington's Waldorf Astoria hotel, security will be much tighter, the guest list smaller, the partying pared down. That much, the correspondents’ association can control. What remains out of its control — and perhaps the biggest question — is what the dinner’s most prominent guest, President Donald Trump, will bring to the table. Call it White House Dinner 2. 0, or Take Two, or, in own...