Last Trump rival John Kasich quits presidential race
Ohio Governor John Kasich has dropped out of the presidential race after struggling to gain traction against Republican front-runner Donald Trump.
Kasich did not have a path to secure the nomination outright, but pledged to lobby for his candidacy during the Republican convention in July.
Trump holds a commanding lead and is closing in on the nomination.
His likely opponent will be Democratic front-runner Hillary Clinton, who lost the Indiana primary to Bernie Sanders Wednesday night.
The New York businessman has made a series of controversial remarks ever since he launched his White House bid by labelling Mexicans as rapists and criminals.
Several senior Republicans said on Wednesday they would not back him, with some saying they would prefer to vote for Clinton.