The above image was published as genuine by New Republic.
It looks suspiciously like a photoshop using this genuine photo...
How idiotic that the New Republic thought that was real. Maroons.
One, the lighting at Camp David is diffuse, it is a cloudy day. You can see under the eaves of the building some ill-defined general shadows straight down. If you look at the receiver and barrel of the shotgun though, you see a slightly more concentrated lighting effect. The lighting in the picture of the shotgun was close, very close, but not quite the same.
The position of the hand on the foregrip, wrapped around the front of it, is a completely unnatural way to hold a shotgun. I've been handling shotguns for 40 years and I've never seen anyone on the range holding one that way.
Speaking of hands, where is his left hand? At least the front edge of it should be visible wrapped around the narrow part of the stock. To hide it, he would have to slide his hand well back from the trigger/grip area onto the thicker portion of the stock - again an unnatural and awkward way to hold a weapon. You always grip around the narrow part, that's why it is narrow! Also, if his hand was slid back out of sight, then his elbow and shirt sleeve should be visible behind his back. Look how long his forearm is on his right arm. Look how close the weapon is to his side. In the golf picture it is not visible because his arm is stretched out away from his body (away from the camera) holding the club. In the skeet picture the stock is apparently much closer to his body, yet where did the forearm and elbow go?
Finally, even without the golf picture I'd suspect this was a fake. One, it is a gay pose (sorry, but it is) to hold a shotgun in on the range. Two, it is apparently sometime between late fall and early spring there - no leaves on the trees. In the VA/DC area it is going to be too cool to be comfortably fooling around outside dressed like that. Winters there are cool/cold and damp.