By now, it should be obvious that the Trump operation exists in two parts. One half is the operation’s face, Donald Trump. The other half is the operation behind the face. Mr. Trump’s persona has often made it difficult to take the entire Trump phenomenon seriously. That, we learned, is a mistake... This Trump transition operation is filled with specialists and veterans extending back to Ronald Reagan’s transition, such as Ed Meese. While New York conducts auditions for the cabinet’s speaking parts, the Washington policy shop is now recruiting the under-, deputy- and assistant secretaryships... I would have preferred seeing House Financial Services Committee Chairman Jeb Hensarling get Treasury, on the assumption that his ability to get tax reform and the overhaul of Dodd-Frank through Congress would have all but guaranteed a revived economy and a successful first Trump term. Mr. Mnuchin will benefit from having Chairman Hensarling as a lodestar in the House... If Mr. Trump’s foreign-policy goal is to “kill ISIS,” it would be hard to design a more effective partnership than Jim Mattis at Defense and David Petraeus at State... These are men who will not argue for committing ground troops unless the U.S. is going to win and then secure the durability of its dear investment there.