It’s like inviting people over for dinner and then insisting you want to buy their children.

Here was newly elected Prime Minister Mark Carney making his first visit to the Oval Office to see President Donald Trump, who has spent months musing about turning America’s northern neighbor into the 51st state.

It didn’t take long for a reporter to ask about what was on everyone’s mind. Trump said he was still interested in annexing Canada, describing the border between the two countries as nothing more than an arbitrary line.

Well that’s true of a lot of borders. The exact spot where they’re drawn is sometimes “an arbitrary line” as opposed to a river or a canyon or an ocean. It doesn’t follow that they can be thrown out by a brainless egomaniac who likes to grab everybody’s stuff.

Carney’s campaign was fueled by a wave of anger at Trump’s aggressive rhetoric, and now was his chance to defend his country to the president’s face. He was polite and firm.

“Some places are never for sale,” Carney said. Canada is one of them, he added, and “it won’t be for sale, ever.”

Trump gave a little shrug and raised his eyebrows. “Never say never,” he responded.

Of course he did, because he’s a rude brainless crass bully.

We apologize, Canada. He’s not house-trained.