It does appear Trump has an unreasonably hard time, compared to other Presidents, getting over 50%. You wonder what else he needs to do? Walk on water? Heal the sick?
With that said, IMVHO, Americans and strategists focus way too much on a totally subjective measure as approval ratings?
Sounds like an old vaudeville routine.
You still sick today?
Like that great writer, Victor Hugo, said, I feels "Les Miserable" now!