NBC's "Late Night" host Seth Meyers joked on Thursday that President Trump Donald John TrumpBiden leads Trump by 36 points nationally among Latinos: poll Trump dismisses climate change role in fires, says Newsom needs to manage forest better Jimmy Kimmel hits Trump for rallies while hosting Emmy Awards MORE admitting to making up facts he didn't know during trade negotiations with Canada is the most honest Trump has ever been.

In an audio recording from a Republican fundraiser in St. Louis, Trump admitted that he insisted to Canadian Prime Minister Justin Trudeau that there was a trade deficit between their two countries without actually knowing if that was true.

“I said, ‘Wrong Justin, you do,'" Trump described the conversation. "I didn’t even know."

"I just said 'you're wrong.' You know why? Because we're so stupid," Trump says in the recording.

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"In fairness, 'I lied because I'm stupid' is the truest thing Trump has ever said," Meyers said to applause in the "Late Night" studio. "Totally tracks."

Including services, the U.S. actually has a trade surplus with Canada. Last year the surplus ran to $2.8 billion.

Trump exempted Canada from his administration's newly unveiled tariffs on steel and aluminum imports, but has said the tariffs could apply to the northern neighbor as well if current talks aren't successful. The protectionist trade policy, a pledge from Trump's 2016 campaign, has been met with threats of retaliation from other major trading partners such as the European Union.

Meyers also called out Trump for reportedly inventing a so-called bowling ball test that Japan performs on would-be car imports to test the integrity of their hoods. White House aides later said that the president was joking at the time.