I’d like to think it was ‘nothing’ but contrary to his outward dumbed down ‘tv’ persona trump can indeed do ‘thinking’ … nasty thinking too.
Theres lots of others too that aid trump in his thinking, both on and off payroll. Hence the value of Mar-a-Lago for such covert lobbying.
There are two reasons for trumps visit, high quality footage of a prestige event and to circle around our camp in the desire to dump USA agricultural produce that falls way below our standards of husbandry and welfare. The lies and fog of obscuration from trump- KAC- Huckabee Sanders etc are endless, trump telling us yesterday that his regime has the cleanest air and water, the highest climate standards. Akin to saying ‘black is white; up is down, left is right’ … dictums I remember are available from George Orwell eighty years ago, how prescient!
Listen to trump on audio without camera footage, its the same old endless vacuous ‘fill a minute’ audio that gets rolled out for any and every occasion. So maybe its a good idea we have him on our shores and can make him ‘stay put’ for a few minutes to listen to something from the real world, something from people that he ordinarily would never hear and how so very far removed from his con-man low IQ pretence and travelling all enveloping sycophantic entourage.
I expect great things from our Queen, Prince Charles, Theresa May in the prodding of his bubble of self-agrandising ignorance.

For instance, the trumpian nightmare …. https://opensociet.org/2019/05/29/in-the-midst-of-our-death-spiral-the-us-department-of-energy-re-brands-fossil-fuels-as-freedom-molecules/