The wall was funny. I liked the wall. When Donald Trump said he wanted to build a 1,933-mile wall blocking the border between America and Mexico, this was a streak of idiot hubris that everybody could enjoy. Hunt online, and you will find numerous joyful examinations of just how tricky it would be to build a wall almost half the length of the Great Wall of China, but without a) indentured labour, and b) taking a whole series of different dynasties somewhere between 200 and 1,000 years.
Make it out of concrete with reinforcing steel, estimates one structural engineer, and you’d need enough of the former to pave a road from Los Angeles to New York (the long way around, into the Pacific and onwards)