Right there, just within reach on the Resolute Desk, is an elegant button. It is not specifically a “Coke” button, rather it is used to summon a White House butler who can attend to the President’s needs. And Mr. Trump likes a refreshing soda, now and again. The button is not unique to him, as the last several presidents have had the button available: I found it sitting on Clinton’s desk in some old pictures, as well. And presidents before that had big clunky phones with lots of buttons; I doubt the butler phenomenon is new to the White House.
I want a Coke Button!