President Donald Trump intends to delay signing a revised version of the North American Free Trade Agreement until after the fall midterm elections, a move aimed at reaching a better deal with Canada and Mexico.

Trump said in an interview that aired Sunday that he could quickly sign an agreement with the United States’ neighbours, “but I’m not happy with it. I want to make it more fair.” Asked about the timing of an agreement, Trump said: “I want to wait until after the election.”

READ MORE: Donald Trump again lashes out at Justin Trudeau and G7 summit: ‘What’s your problem, Justin?’

The president’s decision to push back the NAFTA talks comes as the U.S. and Canada have been engaged in a tit-for-tat trade dispute over Trump’s tariffs on Canadian steel and aluminum. Canada announced billions of dollars in retaliatory tariffs against the U.S. on Friday, and the president signalled the trade rattling could continue.

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WATCH: Trump says auto tariffs won’t increase cost of vehicles because they’ll be built in U.S.

1:14 Trump says auto tariffs won’t increase cost of vehicles because they’ll be built in U.S. Trump says auto tariffs won’t increase cost of vehicles because they’ll be built in U.S.

In the interview on Fox News Channel’s Sunday Morning Futures with Maria Bartiromo, Trump again threatened to impose tariffs on imported cars, trucks and auto parts, saying, “The cars are the big ones.” The move has been viewed as a possible negotiating ploy to restart NAFTA talks, which could resume following Sunday’s elections in Mexico.

If the U.S. moved forward with tariffs on auto imports, it would be a blow to Canada’s economy because of the critical nature that the auto industry plays in the country. The U.S. Commerce Department is expected to hold hearings on auto tariffs in late July and to complete its investigation into auto imports later this summer.

READ MORE: Here’s the final list of Canadian retaliatory tariffs taking effect against Trump on July 1

Trump has sought to renegotiate NAFTA to encourage manufacturers to invest more in America and shift production from low-wage Mexico to the United States. The talks have stalled over several issues, including Trump’s insistence on a clause that would end NAFTA every five years unless all three countries agree to sustain it.

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WATCH: Freeland says NAFTA negotiations separate from tariff response

1:13 Freeland: NAFTA negotiations separate from tariff response Freeland: NAFTA negotiations separate from tariff response

The president has suggested he may pursue separate trade pacts with Canada and Mexico instead of continuing with a three-country deal. But any reworked deal would need to be considered by Congress, and negotiators missed a self-imposed deadline to wrap up the talks by mid-May to allow it to be considered by lawmakers before the November elections.

READ MORE: B.C. restaurants feel the squeeze as Pepsi raises prices due to trade war tariffs

Trump has clashed with Canadian Prime Minister Justin Trudeau over trade, with the U.S. president tweeting last month after departing the G-7 meetings in Quebec that Trudeau was “weak” and “dishonest.”

Trump and Trudeau spoke by phone late Friday after Canada announced it would impose its own tariffs in retaliation for the U.S. tariffs on steel and aluminum imports. Trudeau’s office said the prime minister “conveyed that Canada has had no choice but to announce reciprocal countermeasures” to the U.S. tariffs.

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