Trump to join Republican event just a day after being shot

Donald Trump arrived on Sunday in Milwaukee, where he will be formally nominated as the Republican presidential candidate later this week after surviving an assassination attempt that aggravated an already bitter US political divide.

President Joe Biden, a Democrat, ordered a review of how a 20-year-old man with an AR-15-style rifle got close enough to shoot at Trump from a rooftop on Saturday. As a former president, Trump has lifetime protection by the US Secret Service.

Trump, 78, was holding a campaign rally in Butler, Pennsylvania - a key state in the Nov. 5 election - when shots rang out, hitting his right ear and leaving his face streaked with blood. His campaign said he was doing well.

One person in the crowd was killed and two others were wounded. Secret Service agents fatally shot the suspect, the agency said.

Biden sought to calm the country on Sunday, delivering a brief televised address from the Oval Office in the White House.

"There is no place in America for this kind of violence, for any violence ever. Period. No exceptions. We can't allow this violence to be normalized," he said. "The political rhetoric in this country has gotten very heated. It's time to cool it down."

Trump and Biden are locked in a close election rematch, according to most opinion polls including Reuters/Ipsos. The shooting on Saturday whipsawed discussion around the campaign, which had been focused on whether Biden, 81, should drop out following a halting June 27 debate performance.

Trump is due to receive his party's formal nomination at the Republican National Convention, which kicks off in Milwaukee, Wisconsin, on Monday. The FBI said there were no known threats to the convention or anyone attending, while the Secret Service said they do not anticipate any changes to the security plan.

"I was going to delay my trip to Wisconsin, and The Republican National Convention, by two days, but have just decided that I cannot allow a 'shooter,' or potential assassin, to force change to scheduling, or anything else," Trump wrote on his Truth Social site on Sunday.

The convention will feature televised speeches by rising Republican stars and Trump's choice for a yet-to-be-announced vice presidential running mate while highlighting the party's stance on such topics as abortion, immigration and the economy.