President Donald Trump announced Sunday that he would be meeting with Canadian Prime Minister Justin Trudeau and Mexican President Enrique Peña Nieto to discuss the renegotiation of the North American Free Trade Agreement (NAFTA).

While attending the swearing-in ceremony for 30 White House staff members Sunday, the 45th president signaled his commitment to following through on one of his key campaign promises — renegotiating the “disastrous” trade deal set between Canada, Mexico, and the United States in 1994.

“But we’re going to start renegotiating on NAFTA, on immigration and on security at the border.”

“We’re also meeting with the prime minister of Canada, and we will be meeting with the president of Mexico, who I know, and we’re going to start negotiations having to do with NAFTA,” Trump said. “Anyone ever hear of NAFTA? I ran a campaign somewhat based on NAFTA.”

Trudeau will be meeting with his Cabinet Monday to begin discussing how to approach the Trump administration’s desire to renegotiate NAFTA immediately.

“There’s no realistic way we’re going to renegotiate a NAFTA deal that’s better for Canada,” said John Baird, a former Canadian foreign minister who now serves a senior adviser with international law firm Bennett Jones LLP, Bloomberg reported. “People have to understand this isn’t just the American president. The American public has moved substantially to this stance.”

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Trump’s comments Sunday indicate he is serious about renegotiating NAFTA as rapidly as possible.

“But we’re going to start renegotiating on NAFTA, on immigration and on security at the border,” Trump said. “And Mexico has been terrific, actually terrific. And the president has been really very amazing, and I think we’re going to have a very good result for Mexico for the United States, and for everybody involved.”

Trump has made several indications since taking the oath of office Friday that he intends to move quickly on key campaign promises. Just hours after he was sworn in, Trump carried out the symbolic gesture of signing an executive order targeting Obamacare in which he encouraged federal agencies to begin stripping the massive health care overhaul of its stifling mandates directed at states, businesses, and individuals.

“As I said in my inaugural address, this is not about party. It’s not about ideology. It’s about country, our country, and it’s about serving the American people,” Trump said. “We’re not here to help ourselves. We’re here to devote ourselves to the national good.”