I think it could be window lit Stewart.
If you look at the daughter on the right, her face is lit more on the right than on the left so in that part of the image the dominant light source is to that side.
Over Mr President's head there is a highlight on the door frame that again suggests the one direction of light. And something on the mantlepiece with a similar highlight.
Michelle's face is quite evenly lit and yet again with her being at the angle she is, that suggests a good diffuse light source from one direction.
The light falloff across the green wall to the right would fit with natural window light.
There are no harsh shadows anywhere, no shadows of noses going on so without being able to see the catchlights in the eyes my guess would be a big window with diffusion.
If you look at the daughter on the right, her face is lit more on the right than on the left so in that part of the image the dominant light source is to that side.
Over Mr President's head there is a highlight on the door frame that again suggests the one direction of light. And something on the mantlepiece with a similar highlight.
Michelle's face is quite evenly lit and yet again with her being at the angle she is, that suggests a good diffuse light source from one direction.
The light falloff across the green wall to the right would fit with natural window light.
There are no harsh shadows anywhere, no shadows of noses going on so without being able to see the catchlights in the eyes my guess would be a big window with diffusion.
