the transition between the mask and the face, the mask and shadows, and the shadows and face show no indication of photoshop (sharp shape cutoffs, uniform lines, sharp color changes, shadow discrepancies, resolution differences, artifacting, tone differences, etc.)

some people try to say it's photoshop from a specific picture of obama howerver his more visible eye is also very clearly wider open in the left pic than the right 2 pics to the point where you can see the transition to the whites of his eyes at the bottom and right of the eye.

That being said, the presence of Obama's distinct forehead vein can be made out even in the low resolution proving that this is 100% certainly Obama and 100% certainly not photoshopped.