Concerning jaundice and yellow skin, there are problems that can happen before the liver (pre hepatic) as well as after (post hepatic) that could lead to a backup and high level of bilirubin (the yellow stuff). Basically there's causes other than liver disease itself.
Among other things, infections, blood cancers, and bad reactions to blood transfusions can lead to pre hepatic jaundice, other cancers of the organs and drug-induced cholestasis (sometimes but rarely caused by key anti-dementia drugs rivastigmine, donepezil, and memantine) can cause post hepatic jaundice.
I didn't see a photo of obvious jaundice, it can be subtle in mild or early form, what you're looking for is an even yellowing of the entire white of the eyes, that's where excess bilirubin shows up first, followed by mucous membranes (the inner wet parts of your nose, mouth, back of the eyelids etc, it has to be pretty severe to show up on the rest of your skin, but if it does, it typically starts with the face.
Supposedly that's an IV mark on his hand, hes having problems reading a script or repeating fed lines, and his breathing is getting worse. I'm not seeing an obvious connection, and I wouldn't just assume he has some drug-induced hepatitis or cholestasis unless they're full on overdosing him on purpose.
If he takes Trump's pre-debate drug test, things will be pretty obvious, if not, then, who knows. Maybe I never got the memo but I don't remember ever hearing why Hillary had to be thrown into her own van like luggage either.