Remember Donald Trump’s border wall? For those of you who need a refresher, back in 2015, while announcing his bid for office, the former real-estate developer pitched Americans on the “big, beautiful wall” he was going to build on the southern border and make Mexico pay for. It was a dumb idea then, and it remains a dumb idea three years later, with migration experts saying such an edifice would be meaningless “unless [it] is 35,000 feet high”; government reports warning that construction of the thing would waste billions; and Mexico, shockingly, refusing to foot the bill. Naturally, that hasn’t stopped the president from insisting it’s still going to happen, despite the fact that its financing has shifted from the Mexican government to U.S. taxpayers (who will be reimbursed!), to import tariffs, back to Mexico “indirectly through NAFTA, to the military, to f--k it, the wall’s going to pay for itself. And now, after months of back-and-forth that at one point shut down the government, we’ve learned that the president attempted to foist his special brand of stupidity on Spain, too.

At an event in Madrid this week, Josep Borrell, the country’s foreign minister, told attendees that Trump seriously suggested the Spanish government deal with the Mediterranean migration crisis by building a wall across—wait for it—the Sahara desert. Unsurprisingly, the partition aficionado was apparently undeterred when presented with a series of reasons why Spain would probably take a pass:

According to . . . Borrell, the U.S. president brushed off the skepticism of Spanish diplomats—who pointed out that the Sahara stretched for 3,000 miles—saying: “The Sahara border can’t be bigger than our border with Mexico.”

Trump wooed voters in the 2016 election with his promise to build a “big, beautiful wall” across the U.S./Mexico border, which is roughly 2,000 miles long.