The Republican Party is racing to choose its candidate to put forward to be the next President of the United States.
Former president Donald Trump and his closest rival, former UN ambassador Nikki Haley, have been campaigning ahead of the primary election in New Hampshire, in New England.
Haley questioned Trump's mental fitness after he confused her with Democrat Nancy Pelosi during a speech.
Correspondent Phillip Crowther spoke to Corin Dann.
