Donald Trump virtually sealed his Republican nomination for the United States presidential polls on Tuesday night after he scored a major win at the Indiana primary and his nearest rival Texas Senator Ted Cruz bowed out of the race.
Republican presidential candidate John Kasich is withdrawing from the race to the White House, a media report said on Wednesday.
If elected, he would be the first successful businessman without any political experience to become the US president.
The real estate mogul indicated that economy and trade would be one of his major election issues this summer leading to the November presidential elections.
Trump said he and his campaign has started to shortlist and compile "potential vice presidential" running mates which would include some of his former rivals in the Republican presidential primaries -- Ben Carson and Chris Christie.
Analysts believe the main reason for Trump's popularity surge is that he now enjoys wider support from Republican voters after his decisive win in Indiana earlier this month.
An American journalist has kept his promise of literally eating his words if Donald Trump clinches the Republican presidential nomination as the scribe consumed a nine-course meal featuring newsprint from his column.
He hoped that the candidate 'advances the principles of our party and appeals to a wide, vast majority of Americans'.
Hillary Clinton has surged ahead of Donald Trump in the 2016 presidential race, two new opinion polls showed on Monday, as the Democratic presumptive nominee capitalised on the controversial Republican leader's recent campaign missteps.
Trump's victories came in Maryland, Connecticut, Delaware, Pennsylvania and Rhode Island, while Democratic front-runner Hillary Clinton won in Connecticut, Delaware, Maryland and Pennsylvania
A growing wave of lawmakers have called on the defiant US presidential nominee Donald Trump to drop out of the race in the wake of a video showing him make crude sexual remarks.