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President Donald Trump boasted at a private fundraiser Wednesday of making up trade claims during a meeting with Canadian Prime Minister Justin Trudeau before knowing whether they were true.

“Trudeau came to see me. He’s a good guy, Justin. He said, ‘No, no, we have no trade deficit with you, we have none. Donald, please,'” Trump said during a speech to donors in Missouri, according to audio obtained by The Washington Post and confirmed to CNN by an attendee. “Nice guy, good-looking guy, comes in — ‘Donald, we have no trade deficit.’ He’s very proud because everybody else, you know, we’re getting killed.”

He continued: “I said, ‘Wrong, Justin, you do.’ I didn’t even know. … I had no idea. I just said, ‘You’re wrong,'” Trump recalled, the newspaper reported. “You know why? Because we’re so stupid. … And I thought they were smart. I said, ‘You’re wrong, Justin.’ He said, ‘Nope, we have no trade deficit.’ I said, ‘Well, in that case, I feel differently,’ I said, ‘but I don’t believe it.'”

An attendee at the fundraiser confirmed the accuracy of the Post’s report to CNN.

According to the Post, Trump said he asked an aide to check if he was correct in telling Trudeau the US runs a trade deficit with Canada.

“I sent one of our guys out, his guy, my guy, they went out, I said, ‘Check, because I can’t believe it,'” Trump said.

“‘Well, sir, you’re actually right. We have no deficit, but that doesn’t include energy and timber. … And when you do, we lose $17 billion a year.’ It’s incredible.”

According to figures provided by the Commerce Department, the US ran a $2.77 billion surplus with Canada for 2017. That figure includes oil and timber. It’s unclear what Trump was referring to with the $17 billion figure.

Trump has similarly boasted about pressing Trudeau about the US’s supposed trade imbalance with Canada before, most recently at a December rally in Pensacola, Florida. But he didn’t include the “I didn’t even know” reference, and it’s unclear whether it was an admission that he made up the claim.

Trump’s comments came during a half-hour speech to raise money for Republican Senate candidate Josh Hawley, who’s challenging Missouri Democratic Sen. Claire McCaskill.

During the fundraiser, Trump also reportedly called the North American Free Trade Agreement a disaster and blamed the World Trade Organization for allowing other nations to box in the US on trade.

The President mocked other politicians for supporting NAFTA, attacking Mexico as “spoiled” and arguing that Canada had outsmarted the US, the Post reported.