I was reading about the budget bill today and a fragment of memory from my schoolboy days came to me. I looked it up.
The part I had remembered was “Before I built a wall I’d ask to know
What I was walling in or walling out,
And to whom I was like to give offense.“
Mending Wall
Robert Frost, 1874 – 1963
Indeed. I understand Hadrian’s Wall but who is Trump’s Wall walling in or out?