President-elect Donald Trump is coming for the executive branch. Eight years ago, he thought he could shake up federal agencies and left after four years with little to show for it. This time, with Elon Musk and Vivek Ramaswamy leading the charge, he is talking about even more radical changes. Will he do any better the second time around? Trump isn’t the first president to try to shrink or reorganize the executive branch, or the first to claim to be leading an assault on waste, fraud and abuse that would deliver significant cost savings and more efficient government. Richard M....