The Commander in Chief is seen to be reaching over Chipotle’s sneeze guard to direct server what exactly he wants to be served.
Not that anyone would correct the President and Commander in Chief of the strongest military forces in the world, but this is Chipotle and you just might get your hand slapped. President or not.
The guard is placed there to protect contamination of any sort from being projected from customers onto the food.
Preparers are given hats and hand gloves to insure that food is safe. Perhaps the President didn’t get the memo.