Two years after he dramatically expanded the scope of so-called policy czars, President Obama this year quietly scrapped some of the most controversial posts, tamping down what had been a simmering constitutional fight with Congress. Thanks to what the White House says is a reorganization, czars no longer oversee health care or climate change policy, though less-visible officials such as “cybersecurity czar” and “Gulf Coast claims czar,” among others, are still on the job. But even as Capitol Hill’s objections have been overshadowed by other fights between the executive and legislative branches over the nation’s borrowing limit and the NATO-led...