Donald Trump never expected to be president. And, we might reasonably surmise, perhaps didn’t really want to be. Think about that as President Trump seeks to remake America’s relationship with the world as dramatically as any president in 70 years.

The Greek witch-goddess Circe gave her son a magic weapon to protect him on his search for his father, Odysseus. When father and son finally met, Odysseus was accidentally killed by the magic weapon. Oops.

Then-FBI...