They would have looked even better in front of a lighter background.
I dunno. Trump’s carrying a few extra pounds and the black tux is slimming, against a light/white background he might look like a slightly overweight penguin.
Lots of thought go into official photographs like this, so the composition wasn’t accidental; I imagine the photographer intended it to come out like this.
The only improvement I would have made is to crop it more for a tighter shot - I would have actually left out the lighter part, heh. Just use the doors as the background.
At any rate, this’ll do just fine.