A Reuters photograph of White House Press Secretary Kayleigh McEnany’s vast briefing binder offered a peek behind the curtain of the Trump administration’s messaging priorities. Taken from the side of the White House briefing room podium, the photograph catches McEnany opening the book, exposing dozens of alphabetized tabs with short category names. During her tenure, McEnany has developed a reputation for flipping open her briefing book after a particularly confrontational question and reading verbatim from pre-written responses, which often included canned attacks on the press or praise from allies. In the photo taken at Thursday’s White House briefing, McEnany’s tabs...