This is the APs statement on it:
"The halo issue has been around for over a decade," he said. "It's never been our photographers' goal to give the president a heavenly glow. The out-of-focus presidential seal is simply a tool to separate the subject from the background so he is not speaking in a sea of black."
Uh huh, right. A search for "Bush Halo" turns up what appears to be three actual photos of Bush aligned with a halo-looking background if you discount the versions of same where they are scaled and/or flipped. Obama has dozens. Planned propaganda. And the proof will be when after four years of Trump we can go back and see not one picture of him like that.