It looks like he has an egg white glaze;

[Mike 03]

4. Was this a White House pool feed? Or did every network have its own camera?

Because it kind of looks like there's a diffusion filter (diffuse glow?) on the lens, like they used in the old days to film stars like Greta Garbo and Bette Davis. See how his hair is all blurred along the forehead? If true, that would be embarrassing to Trump if it got out.