Trump offers dramatic account of assassination attempt

Donald Trump has described how he narrowly survived an attempt on his life, and honoured Corey Comperatore, who lost his life at the Republican National Convention.

"I heard a loud whizzing sound and felt something hit me really, really hard on my right ear," he said in Milwaukee, a thick bandage still covering his ear. "I said to myself, 'Wow, what was that? It can only be a bullet."

When he told the crowd that he was "not supposed to be here," the crowd chanted back, "Yes you are!" With photos of a bloodied Trump showing on screens behind him, Trump praised the Secret Service agents that rushed to his side and paid tribute to the volunteer firefighter who was killed, Corey Comperatore, kissing his fire helmet.

The former president struck an unusually conciliatory tone during the speech's opening moments, when he formally accepted the party's presidential nomination.

"I am running to be president for all of America, not half of America, because there is no victory in winning for half of America," he said, in a marked shift in tenor for the typically bellicose former president.

But he swiftly pivoted to well-worn attacks on the Biden administration, claiming without evidence that his criminal indictments are politically motivated efforts to prevent his election.

The speech caps a four-day event in which he was greeted with adulation by a party that now appears entirely in his thrall.

The convention's program of speakers reflected the nominee's background as a reality television star - the primetime list featured mixed martial arts executive Dana White, the rap rock star Kid Rock and wrestler Hulk Hogan, who fired up the crowd by tearing his top off to reveal a Trump campaign T-shirt. 

His entrance was befitting of a TV star or a pro wrestler - a screen lifted slowly to reveal Trump standing in front of massive lights arranged to spell out his last name before an image of the White House was projected behind him.

Trump's opponent in the November 5 election, meanwhile, Democratic President Joe Biden, was "soul searching" about whether to drop out of the race entirely, one source said, after senior party figures, congressional allies and major donors warned him he could not win following a halting debate performance on June 27.

Biden, 81, was isolating at his Delaware home after contracting COVID-19. His doctor said he was experiencing mild symptoms.

Before Trump was due to take the stage for his keynote address, the convention paused to welcome his wife, Melania Trump, who has rarely been seen during the campaign. She entered the arena to classical music and waved to the crowd from a box next to Trump's vice presidential pick, Senator J.D. Vance.

Some of the eclectic group of speakers - including conservative commentator Tucker Carlson, who received a huge ovation, and Trump's son Eric - employed heated language in denouncing the Biden administration.

The head pro at Trump's Florida golf club, John Nieporte, praised Trump's skills on the course and claimed the former president had won 21 club championships.

"Joe Biden? Zero," he said, evoking the surreal moment from the presidential debate when Trump and Biden argued over which of the two candidates had a better golf game.

With his grip on the Republican Party never tighter, Trump will be in a much stronger position than in his 2017-2021 term to follow through on his agenda if he wins the election.