1. President Trump and Dubya have what appear to be glasses of Coca-Cola in front of them. Nixon has a wine glass, and according to this website, Red wine was Nixon's drink of choice.
2. It looks to me as if Lincoln made some sort of quip, but the interpretation is in the eye of the beholder.
3. See below:
Thanks for the assist.
It makes the whole thing a little sadder, I think. All the other ‘also-rans’ in the background, and the First Woman out there on the outside looking in.
Maybe its just the mood I’m in.