Donald Trump, US presidential candidate, has put a range of price tags on the wall he wants to build on the 2,000-mile border with Mexico. It would be 1,000 miles long, made of precast concrete slabs, rising 35 to 40 feet in the air.
John Oliver, the British presenter of Last Week Tonight, a US comic news show, says Trump’s estimates of the cost range from $4bn, $6bn, $7bn, $10bn and $12bn. Estimating the cost of the wall based in part on a piece by Glenn Kessler of The Washington Post, Oliver concluded that the wall would actually cost “conservatively” $25bn.
