Former Republican presidential contender Chris Christie has formally backed Donald Trump for the nomination, becoming the most prominent mainstream party member to endorse the controversial billionaire.
Mr Christie, speaking alongside Mr Trump in Fort Worth, Texas, said the real estate mogul had the best chance of beating Democrat Hillary Clinton in the November 8 presidential election.
“Donald Trump is someone who when he makes a promise, he keeps it,” said Mr Christie, who until two weeks ago was himself a rival of Mr Trump.
“There is no-one who is better prepared to provide America with the strong leadership that it needs both at home and around the world than Donald Trump.
“The single most important thing for the party is to nominate the person to give us the best chance to beat Hillary Clinton.”