Trump was speaking to Fox News presenter Megyn Kelly, with whom he has had a feud since a TV debate last August and in another interview, he has said that he was open to meeting North Korea's leader.
The question and answer session with Ms Kelly was largely seen as an attempt to bury the hatchet after months of rancor between the two, with the journalist taking the initiative to set it up and Ms Kelly has revisited the issue on Tuesday night, as was asking Mr. Trump whether he has regretted certain comments about Senator John McCain and former rival for the Republican nomination Carly Fiorina.
Mr. Trump has also said that if his campaign to win the presidency ended in failure then he will consider it to be a total and complete waste of time, energy and money and he has added that if they didn't conduct himself in the way he has done, and he don't think that he would have been successful.
The US and North Korea have no formal diplomatic relations and Mr. Trump has won the Republican primary in Oregon on Tuesday, where Bernie Sanders has emerged victorious in the Democratic race. The Kentucky primary, which was Democratic, only was too close to call but Hillary Clinton has declared victory with most of the votes counted.
