Just fiddling with the image, little observations.
I'm not a stego/photofag though.
The shadows of POTUS & FLOTUS don't seem to cast over the ring with the words "Seal of the President…"
Also, it is a little tough to see, but there is a box, of sorts, that doesn't seem like it would be a natural part of the floor/seal (all the red arrows point at it).
There's also all that noise at the top and bottom of the image.