Scott Walker, the governor of Wisconsin and a Republican contender for the president's job, has been ridiculed online since raising the idea of building a mammoth security wall along the Canada-U.S. border.

Walker entertained the idea during an interview on NBC's Meet the Press on Sunday, where he called the wall a "legitimate issue."

It's rare to see the Canadian border being discussed during a presidential campaign, as candidates more often talk about the southern border. Walker's fellow presidential candidate, Donald Trump, has called for a "real wall" to be put up between the U.S. and Mexico. And he plans to get the Mexican government to pay for it.

The possibility of a Canadian wall, on the other hand, got a whole lot of laughs online.

I do agree with Governor <a href="https://twitter.com/hashtag/Walker?src=hash">#Walker</a> that "Canada Wall" would be a sweet punk rock band name. —@JohnnyWalsh

So Scott Walker wants a border wall with Canada? I don't think it will work. They're used to climbing over walls. <a href="http://t.co/oDiHk0mOjG">pic.twitter.com/oDiHk0mOjG</a> —@NCSox

Will the Canada wall only be felled by Dragon Fire or the Horn of Joramun? <a href="http://t.co/vebj6yenLF">pic.twitter.com/vebj6yenLF</a> —@wupton

<a href="https://twitter.com/inreallifealex">@inreallifealex</a> Our skates are sharpened, we're coming for their cheese! —@seanvsmachine

<a href="https://twitter.com/GovWalker">@GovWalker</a> , <a href="https://twitter.com/hashtag/CanadaWall?src=hash">#CanadaWall</a> really only works in the summer. <a href="http://t.co/xljyDX557q">pic.twitter.com/xljyDX557q</a> —@astrodex

Of course, the Democrats also got in on the fun with a little help from Kanye West (another possible presidential candidate?).

Scott Walker said building a U.S.-Canada wall is a "legitimate" idea. <a href="http://t.co/BPunJbaZWU">http://t.co/BPunJbaZWU</a> <a href="http://t.co/wwSwgYQbsx">pic.twitter.com/wwSwgYQbsx</a> —@TheDemocrats

Fellow Republican presidential hopeful Rand Paul took a jab at Walker too.

The Kentucky senator told a Boston radio station that a wall between Canada and the U.S. would be a "pretty dumb idea."

Rand Paul Calls Canada Border Wall Idea 'Pretty Dumb'. That's the smartest thing he said so far on the campaign trail <a href="http://t.co/8JH7MpC9Ft">http://t.co/8JH7MpC9Ft</a> —@wes_chu

Some Canadians responded with a shot of sarcasm...

As long as I can still get HBO, build away! Scott Walker says building Canada border wall is a 'legitimate issue' <a href="http://t.co/scLRXqHEtw">http://t.co/scLRXqHEtw</a> —@JoshuaLambier

I for one am for this cross border fence. Think of it it'll protect Canada from US crazies + think of the tourism revenue see Wall of China —@GCR65

If he becomes president I'll lay the first brick! Scott Walker mulls wall along Canada-US border <a href="http://t.co/CxVgBGx9RJ">http://t.co/CxVgBGx9RJ</a> via <a href="https://twitter.com/TheSpec">@thespec</a> —@JeffreyLuscombe

... while others put some serious thought into the logistics of how it would be built.

It would be a long wall. The border stretches 8,891 kilometres across land and water.

Will your anti-Canada wall float in the Great Lakes? <a href="https://t.co/cTGwjEtqmZ">https://t.co/cTGwjEtqmZ</a> —@Kat4Obama

It wasn't all laughs. One user was seriously concerned at how the proposal would impact jobs, particularly in Walker's home state of Wisconsin...

158,000 Wisconsin jobs depend on trade &investment with Canada <a href="https://twitter.com/hashtag/scottwalker?src=hash">#scottwalker</a> 's <a href="https://twitter.com/hashtag/CanadaWall?src=hash">#CanadaWall</a> put em at risk <a href="http://t.co/OeR7fnKCEu">http://t.co/OeR7fnKCEu</a> <a href="https://twitter.com/hashtag/elxn42?src=hash">#elxn42</a> <a href="https://twitter.com/hashtag/p2?src=hash">#p2</a> —@pqpolitics

... while many Americans just felt sorry for Canadians altogether.

Frankly, I'm surprised Canada hasn't already built a wall to keep us out. —@bermanmatt