"This new deal will be the most modern, up-to-date, and balanced trade agreement in the history of our country, with the most advanced protections for workers ever developed", President Trump released in a statement.
'We worked hard on this agreement - it's been long and hard, ' he said.
Since then, the three sides have bickered over the wording and the finer points of the deal and still had not agreed just hours before officials were due to sit down and sign it as the Group of 20 summit kicks off in Buenos Aires.
"Donald, it's all the more reason why we need to keep working to remove the tariffs on steel and aluminum between our two countries", Trudeau said.
Trudeau made a personal plea to Trump during the ceremony to get rid of the tariffs, saying the recent closures of auto plants by General Motors in the United States and Canada made it more important. Before leaving for Argentina Thursday Trump told reporters he believes a fair deal for both countries can be reached. In the US, as Politico notes, that could mean "months of fierce debate between the Trump administration and Congress".
On his final day as Mexico's president before Andres Manuel Lopez Obrador is sworn in on Saturday, Pena Nieto said the trade agreement includes provisions for e-commerce and information technology. After the signing, US trade chief Robert Lighthizer told reporters that negotiations are ongoing but that they see the tariffs as successful policy, CBC reported.
Merkel set for late G20 arrival after ‘serious’ plane malfunction
The aircraft landed safely in Cologne, with journalists on board reporting no injuries. Merkel will now travel to the G20 with a vastly slimmed-down delegation.
"I don't expect to have much of a problem", Trump said during the ceremony.
The deal 'changes the trade landscape forever, ' Trump said.
Despite the symbolism of Friday's signing, Trump has no meetings with Trudeau scheduled while the two are in Argentina.
Canadian Prime Minister Justin Trudeau was less effusive about the renegotiated pact, but said the USMCA would resolve the threat of "serious economic uncertainty" that "would have gotten more damaging".
United States objections to Canada's protected internal market for dairy products was a major challenge facing negotiators during the talks, and Mr Trump repeatedly demanded concessions and accused Canada of hurting USA farmers.
Trudeau and Trump discussed their plans for the G20 summit in a November 27 phone call, according to the White House. "Now, it is gone-at least between Canada and the U.S".
The deal emerged in early October, months after Trump hit Mexico and Canada with tariffs on their steel and aluminum products - a move set off retaliatory tariffs and negotiations to create a new trade pact.