President Donald Trump has an expansive view of how much unchecked power the U.S. chief executive can wield. For example, in a speech back in July 2019, he asserted, "I have an Article II, where I have to the right to do whatever I want as president." The Article II to which Trump was referring is the section of the U.S. constitution that outlines the powers given to the president. Among other things, that article requires that the president "shall take care that the laws be faithfully executed." An ordinary language reading of that section does not prima facie suggest...