More than four in 10 Americans would support building a wall across the Canadian border.

That's according to a Bloomberg poll released on Thursday that shows 41 percent of Americans would favour a "brick and mortar" wall along the Canadian border.

The Canada question was follow-up to a query on a Mexican border wall: "If a wall is good for the Mexico border, it is good for the Canada border as well?"

The poll surveyed 1,001 American adults over 18 years old, and, according to Bloomberg, is accurate within 3.1 percentage points.

Bizarre as it may be, the idea of a wall along the Canadian border has some prominent supporters.

Last month, Wisconsin Gov. Scott Walker raised the idea on NBC's Meet the Press, when he was still a contender for the Republican presidential nomination.

"Some people have asked us about that in New Hampshire," he said. "They raised some very legitimate concerns, including some law-enforcement folks that brought that up to me at one of our town-hall meetings about a week and a half ago. So that is a legitimate issue for us to look at."

Walker later said he didn't want to build the wall after all. Last week, amid sagging poll numbers, he dropped out of the race.

Much of the fiercest pro-wall rhetoric has come from bombastic U.S. billionaire and presidential hopeful Donald Trump, who has made a border wall with Mexico one of his major campaign promises. 

Trump has said he "loves Canada" and wouldn't put a wall on the northern border if elected president. 

Actor Matt Damon joked that he supports a wall to help keep the "white walkers" out.

It should be noted that the Bloomberg poll found a majority of Americans are still against building a wall along either the Mexican or Canadian borders, but the results still have Canadians talking. 

Most seem surprised by their American neighbours.

Plenty seem to think it's ridiculous. 

Others think it might actually be a good idea.

And some were left asking this question...

It does make you wonder though, doesn't it?