REPUBLICAN US presidential candidate Donald Trump vowed to tear up international free-trade deals in his final convention speech on Thursday evening.

The billionaire garnered roars of approval for a populist tirade against Democratic Party rival Hillary Clinton. “America has lost nearly one-third of its manufacturing jobs since 1997, following the enactment of disastrous trade deals supported by Bill and Hillary Clinton,” he said.

“No longer will we enter into these massive deals, with many countries … instead, I will make individual deals with individual countries,” Mr Trump continued.