The Wall?

[The Valkyrie]

I completely support the Canadians building a wall along their southern and western borders.

I support the rest of the world building a wall around the continental United States and making them pay for it. Put a lid over it for completeness. Airtight, for preference.

Reminds me of a joke a Kiwi told me once.

An Aussie and a Kiwi walking along the beach.

Lamp.  Genie, the usual.

They get one wish each.

The Aussie says, "I want Australia surrounded by an impenetrable wall 500 metres high so we can protect our great land and no foreigners can get in without permission."

*Poof*

There's a 500 metre high wall around Australia.

"Now, fill it with water." says the Kiwi!