Both Ted Cruz and John Kasich have fallen by the wayside, while Donald Trump dashed to the finishing line of Republican Party nomination for the US presidential race in 2016.

Ohio Governor John Kasich has dropped out of the presidential race after struggling to gain traction against Republican front-runner Donald Trump, US media report.

Some people run simply out of ego or greed. The publicity that attends a presidential bid can garner even a failed candidate a book contract, a television gig, or a well-paid speaking career (or perhaps all three). Trump ran on the basis of his celebrity.

Republican Donald Trump and Democrat Bernie Sanders have shaken up the US presidential race with decisive victories in the New Hampshire primary.