In a country already on edge, the assassination attempt on former US president Donald Trump has enraged his supporters, paused the Democratic campaign and raised fears of further political violence in the run-up to November's election.
Mr Trump's Republican allies painted him as a hero on Saturday, seizing on the image of him with his ear bloodied and fist raised, appearing to mouth the words "Fight! Fight! Fight!"
Whereas Mr Trump has regularly used violent language with his followers, advisers and allies of the former president flipped the script on his Democratic opponent president Joe Biden, saying it was the demonisation of the Republican presidential candidate that led to the assassination attempt.
"Today is not just some isolated incident. The central premise of the Biden campaign is that President Donald Trump is an authoritarian fascist who must be stopped at all costs. That rhetoric led directly to President Trump's attempted assassination," US senator JD Vance of Ohio, a top candidate to be Mr Trump's running mate, said on X.
Mr Biden moved quickly to try to defuse the situation, denouncing the attack as unacceptable political violence and pulling election ads attacking Trump.
"There's no place in America for this kind of violence. It's sick," Mr Biden told reporters.
The motivation of the shooter is not yet known. The suspect, 20-year-old Thomas Matthew Crooks of Bethel Park, Pennsylvania, was a registered Republican, according to state voter records. He previously made a $15 donation to a political action committee that raises money for left-leaning and Democratic politicians.
In the short term, the attack will likely boost Mr Trump's appearances in Milwaukee this week at the Republican National Convention as he accepts his party's presidential nomination, fortifying the sense of grievance and estrangement his supporters already feel toward the nation's political class.
Within hours of the shooting, Mr Trump's campaign sent out a text asking voters to contribute to the campaign. "They're not after me, they're after you," the message read.
Billionaires Elon Musk and Bill Ackman also swiftly endorsed Mr Trump. "I fully endorse President Trump and hope for his rapid recovery," Mr Musk said on X, the social media site he owns.
Chris LaCivita, the co-manager of Mr Trump's campaign, said on X that "for years and even today, leftist activists, Democrat donors and now even Joe Biden have made disgusting remarks and descriptions of shooting Donald Trump ... it's high time they be held accountable for it ... the best way is through the ballot box."
Mr LaCivita was apparently referring to recent remarks by Mr Biden made in the context of asking his supporters to focus on beating Mr Trump rather than his own performance. "So, we're done talking about the debate, it's time to put Trump in a bullseye," said Mr Biden, who has always condemned any political violence.
Political attacks
The US is grappling with the biggest and most sustained increase in political violence since the 1970s. Of 14 fatal political attacks since supporters of Mr Trump stormed the US Capitol on January 6th, 2021, in which the perpetrator or suspect had a clear partisan leaning, 13 were right-wing assailants. One was on the left.
Despite being a former president, Mr Trump has campaigned as an outsider insurgent, complaining that he has long been targeted by the federal "deep state" and Mr Biden's administration to prevent him from reclaiming power.
He has typically employed violent, degrading and even apocalyptic rhetoric while doing so, warning of a "bloodbath" if he is not elected and saying immigrants in the United States illegally are "poisoning the blood of our country".
Some Republicans were already agitated by his continued stoking of the fire.
"If the country wasn't a powder keg before, it is now," said Chip Felkel, a Republican operative in South Carolina who has opposed Mr Trump.
Brad Bannon, a Democratic strategist, said the shooting could benefit Mr Trump politically because it feeds into his campaign narrative that the country is off-track.
"The attempted assassination creates sympathy for Trump," Mr Bannon said. "It also confirms the idea to voters that something is fundamentally wrong in this nation, which is an idea that drives support for him."
Mr Trump in May was found guilty of engaging in a scheme to cover up an affair with a porn star, a conviction that did little to alter the race and suggested supporters of both sides remain entrenched in their positions.
Mr Biden has dealt with a debate within his own party over whether he should step down as the Democratic candidate because of concerns that he is no longer fit for the job. He says his doctors have told him he is in good shape. Mr Trump has benefited in some polls from Mr Biden's disastrous debate performance last month, but others show the race to be even.
Many voters have already been alienated by both Mr Biden and Mr Trump. The chaos that surrounds the candidates may contribute to voters feeling that the nation's problems are unfixable and the gulf between the parties cannot be bridged.
US representative Steve Scalise, a Republican who was shot by a gunman in 2017, told Fox News that violent election rhetoric needed to stop.
"All it takes is one person who is just unhinged to hear that and go out and act on it and think that's their signal to go take somebody out," he said.
