Donald Trump has reached the number of delegates needed to win the US Republican presidential nomination. While Trump has had the nomination locked down for weeks, he has now reached the threshold of 1,237 delegates with the help of previously uncommitted delegates who now support his candidacy. A handful of states, including the large prizes of California and New Jersey, will hold the final primaries on June 7.

Trump was put over the top in the Associated Press delegate count by a small number of the party’s unbound delegates who told the AP they would support him at the national convention in July. Among them is Oklahoma GOP chairwoman Pam Pollard. "

I think he has touched a part of our electorate that doesn't like where our country is," said Pam Pollard, Oklahoma Republican party chairperson.

"I have no problem supporting Mr Trump."

A triumphant Trump unleashed attacked Democratic candidate Hillary Clinton on Thursday on her policies on energy, guns, the economy and international affairs.

Trump announced his decision to compete for the Republican presidential nomination on June 16 last year.

Trump fought 16 other Republican contenders in the primary race. They fell one by one - leaving Trump the sole survivor of a riotous Republican primary.

Trump, 69, the son of a New York City real estate magnate, had risen to fame in the 1980s and 1990s, overseeing major real-estate deals, watching his financial fortunes rise, then fall, hosting The Apprentice TV show and writing more than a dozen books.