WASHINGTON — For the moment, at least, it appears to be a clear-cut victory — the biggest foreign policy win of his young administration. President Donald Trump has brought his arch-nemesis, North Korean leader Kim Jong Un, a.k.a. “Little Rocket Man,” to the table to negotiate away his nuclear arsenal. Optimists declared a major breakthrough. Even pessimists acknowledged that Trump’s hard line against Pyongyang, after decades of less forceful U.S. effort, played a significant role in moving one of the world’s most vexing and threatening problems in a potentially positive direction. But in the afterglow of the surprise announcement — […]