What is up with that tan line photo of Trump?

Friday evening, an unverified Twitter account posted a photograph of President Donald Trump exhibiting a serious facial tan line. By Saturday, the photograph had gone viral, with people across social media questioning the photographer’s motives — and making memes.

The photo was shared by the account @photowhitehouse, which claims to be run by a photographer named “William Moon.” It features Trump looking wryly over his shoulder, with the wind picking his hair up in a way that reveals a stark contrast between the color of his face and the area...