Donald Trump has vowed to renegotiate the USMCA free trade agreement with Canada and Mexico if he wins the November presidential election.

"I am announcing today that upon taking office, I will formally notify Mexico and Canada of my intention to invoke the six-year renegotiation provisions of the USMCA that I put in," Trump told the Detroit Economic Club on Thursday.

Following tense negotiations, the U.S.-Mexico-Canada Agreement went into effect in 2020 to replace the earlier North American Free Trade Agreement (NAFTA), which Trump targeted early in his first presidency. The new agreement is up for review on its sixth anniversary in 2026.

"That was the hardest thing I had to get, they didn't want that," Trump said of the unique review clause. "I said, 'Nope, I want to be able to renegotiate in six years, otherwise we're not making the deal.' And I got it, and it's coming due very soon. Oh, I'm going to have a lot of fun."

Speaking on Thursday in Motor City, Trump said he wanted to better protect the U.S. auto industry and stop countries like China from shipping products tax-free into the U.S. via Mexico.

"I terminated NAFTA. That's a pretty big thing," Trump said. "A lot of people said it would be impossible to do. I got it done, and we have a great deal now. What we have to do is make it much better even, and we'll be able to do that very shortly."

This is a developing story and will be updated