US President Donald Trump has renewed his threat to scrap the North American Free Trade Agreement (NAFTA), going off on trading partners Canada and Mexico.

Trump made his stance known in a series of tweets on Sunday. The timing is quite auspicious as it is days before the resumption of negotiations between the three nations on re-writing the agreement.

“We are in the NAFTA (worst trade deal ever made) renegotiation process with Mexico & Canada. Both being very difficult, may have to terminate?” he wrote.tweeted. The dissolution of the NAFTA agreement was one of many campaign promises made by the US president, alongside building a wall on the US-Mexico border, protectionist economic policies and cracking down on immigrants.

His rhetoric had been centred on the belief that the NAFTA deal is not beneficial to America and Americans as it is killing jobs and exacerbating the U.S. deficit.

The NAFTA agreement came into existence 23 years ago during the tenure of President Bill Clinton.

The other countries at the negotiating table, Canada and Mexico, have dismissed the comments as a “negotiating tactic”.