Since this week’s surprise announcement that Nikki Haley would depart by year’s end, everyone wants to know who’ll replace America’s UN ambassador — who was first dismissed, then hated, then feared and eventually appreciated, heck, even loved (at least by some). The answer, obviously, is up to the never-predictable President Trump, so most names bandied about are speculative, with many driven by wishful thinking. So here’s a wish: Christopher Burnham. Never heard of him? You may soon. Sure, there are other worthy candidates; Washington reporters come up with new ones daily. The much-advertised front-runner, former Deputy National Security Adviser Dina...