Haley vows to stay in race despite bruising South Carolina loss and argues Trump cannot beat Biden – as it happened

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• Trump soundly defeats Nikki Haley in South Carolina Republican primary

Donald Trump's victory speech has mostly been a lovefest - until he called up the state's US senator Lindsey Graham.

Graham, who famously predicted in 2016, If we nominate Trump, we will get destroyed" but nonetheless became an ally, was greeted with an awkward combination of boos and cheers from the crowd.