My advice.

A wall in the Saharan Desert?

.... your 20' wall which will catch sand could be covered in a matter of hours. But not to
worry the Sahara desert is the size of China so building a wall to keep all those "dark people"
to stay in their mud huts in their shit hole countries shouldn't be a problem.

The Con's onion brain full of water

Make the poor nations of Africa pay for it.

Problem solved.

now with Spain's assistance

always remember, Trump's various walls are, will be, and always have been a metaphor for expressing racism to a (large) segment of his rabid base.

when we ridicule the idiocy of an actual wall, we miss the point and the magats laugh at us falling for it. they're getting exactly what they want from Trump. all that's necessary to please them is expressions of white nationalist superiority, everything else is gravy.

Or another set of six "walls" would be great!

how about a wall across the Atlantic Ocean to stop hurricanes?

or even where it is.

Since this is in reference to Spain, Trump may have had the tiny Spanish enclaves of Ceuta and Melilla on the northern shores of Morocco's Mediterranean coast in mind.

Migrants who make it from Morocco into these two areas then have access to Europe,
having gained access to Spanish territory.

"Increasingly Ceuta and Melilla's heavily fortified borders have come under pressure from African migrants seeking a better life in Europe."

https://www.bbc.com/news/world-africa-14114627

...................................................

"Some 1,000 African migrants who stormed a razor-wire border fence between Morocco and the Spanish enclave of Melilla were repelled by police."

http://news.bbc.co.uk/2/hi/africa/4314784.stm

... and now he wants them to build a wall?

Spain has some experience here, having defeated the Moors in 1492 and ordering the expulsion of their descendants in 1609.

Perhaps Trump sees himself as the second-coming of Charles "The Hammer" Martel.

I'm guessing Trump will largely be ignored by Spain.

Yeah but it took 700 years for them to finally do that and regain their territory. That's a long ass time.

... but they didn't have Donald Trump.

He'd have been the best Spanish king ever. Best leader of armies. And he'd have discovered the new world much faster.

Cristóbal Colón might not have gotten paid!

(thanks for taking anything it publishes with a barrowload of salt).

Here's The Guardian with its own sourcing:

"When all you have is a hammer, every problem looks like a nail."

Link to tweet