Donald J. Trump’s mouth provides an endless supply of nonsense.

The wall he intends to build to keep an imagined horde of criminals and terrorists from entering the United States of America provides a stark example of his “ready, fire, aim” approach to public policy.

The New York Times, in an editorial published Sunday, took note of the enormously complicated task associated with building a wall across our nation’s southern border.

Did the Republican candidate for president consider any of them before riding down the escalator to announce his candidacy in the summer of 2015? Umm. Nope. No way, man.

The Times asks:

“How do you build a wall along the 1,200 miles of the Rio Grande, the Texas stretch of border? Do you put it on our side and abandon the river to Mexico, or seize Mexican territory for it, or put it in the middle of the river, or do some zigzag compromise? What do you do then about a treaty requiring that both countries have open access to the river?

“How do you make a concrete wall see-through, so smugglers aren’t invisible to the Border Patrol?

“How do you get private landowners to go along? What about the Tohono O’odham Indians, whose reservation straddles the border in Arizona and who want no part of any wall on their sacred land?

How do you wall out deep tunnels, drones and catapults? What about the tons of drugs that pass through existing ports? Did you know that drug cartels have ships and submarines? What happens when drug bales start coming ashore in San Diego, or over from Saskatchewan?