That's a funny one. Here’s the official photo of Trump as President of the United States, the image that will be shown on numerous official occasions, including at all US Embassies around the world. So, it is an important picture, but it still looks awkward for an official image. I know this posture is speculated to be similar to Trump's posture in a mugshot. Still, the posture doesn’t bother me as much as the lighting setup, better suited for an experimental or editorial context than for official use. However, if you want to know why this is happening—why the lighting setup looks a bit harsh, uncontrolled, and reminiscent of a Hitchcock-style angle—it’s because the photographer, Daniel Torok, was using studio lighting for the first time ever. He also revealed that he made “hundreds” of edits to this photo. So, an overedited picture made by an inexperienced photographer seems to explain this output.