Trump tried again, saying, “But, the people on television saying their dog was eaten by the people that went there.” Muir countered once more. “Again, the Springfield city manager says there is no evidence of that,” he said. “We’ll find out,” an unrepentant Trump said.

In the past few years, Springfield has experienced an influx of Haitian immigrants, who are in the United States legally. They have filled jobs in local businesses, but they also have put a strain on the city’s services and caused an uproar among some local citizens. Trump and running mate Senator J.D. Vance, seeking to highlight the issue of immigration in the campaign, helped put the town in the spotlight after an 11-year-old boy was killed in a traffic accident caused by a Haitian migrant.

Nathan Clark, the boy’s father, recently denounced those who have invoked the death of his son to score political points, calling it reprehensible. “To clear the air,” he said last week, “my son Aiden Clark was not murdered. He was accidentally killed by an immigrant from Haiti.” He criticised Trump, Vance and other politicians for using the tragedy to advance their own interests. “They have spoken my son’s name and use his death for political gain,” he said. “This needs to stop now.”

The repeated false claims about the Haitian community have brought threats to the city. On Friday, two elementary schools in Springfield were evacuated because of bomb threats and a middle school closed. It was the second day in a row that schools were closed due to such threats. The Columbus Dispatch reported that one of the threats included the same debunked claims about the migrant community that have circulated on social media.

Trump continues to fuel anti-immigrant outrage. He has previously said that if elected he would order the deportation of all undocumented immigrants living in the United States, a proposal judged by experts as both impractical and legally questionable. During a Friday news conference with reporters in California, Trump said, “We’re going to have the largest deportation in the history of our country. And we’re going to start with Springfield and Aurora [Colorado].”

Aurora is another city Trump cites as being destroyed by illegal migration, saying that it has been overrun by Venezuelan gangs. Aurora Mayor Mike Coffman, a former Republican US House of Representatives member, said last week that such claims are “grossly exaggerated,” that the problem is limited to specific housing properties and it is being dealt with by law enforcement.

That Trump has lost focus on the messages his campaign wants to highlight has been evident for weeks. There are issues that could put Harris on the defensive, if he were capable of a sustained and effective message based on facts and not falsehoods. He’s proving that he isn’t able to do that.

Most polls show that voters believe he is better able to handle the economy and inflation, issues at the top of voters’ lists of concerns. He has an advantage on immigration. Beyond that, Harris is still trying to fill out her profile for voters. In a Friday interview with Brian Taff of WPVI-TV in Philadelphia, she offered mostly general answers to some specific questions about how she would lower prices and where she differs with Biden.

In the debate, Trump tried repeatedly to put immigration front and centre, but he was ineffective, in large part because of exaggerations or, as with the Springfield example, outright lies. Many Republicans who support Trump for president fear he is neither talking about what matters most to voters nor heeding the counsel of his campaign’s senior advisers.

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Meanwhile, the question of who has his ear has come to the fore. Laura Loomer is an attention-seeking purveyor of racist and homophobic comments and a spreader of conspiracy theories. Recently she posted on X that if Harris, who is black and Indian American, is elected, the White House will “smell like curry & White House speeches will be facilitated via a call centre”.

Last week, Loomer accompanied Trump to the debate in Philadelphia and joined him the next day at ceremonies commemorating the 23rd anniversary of the September 11, 2001, terrorist attacks. A year ago, she had posted on X that those attacks were “an inside job”, a conspiracy theory for which there is no evidence.

Her presence at Trump’s side has alarmed many Republicans. North Carolina Republican senator Thom Tillis recently posted on X: “Laura Loomer is a crazy conspiracy theorist who regularly utters disgusting garbage intended to divide Republicans. A [Democratic National Committee] plant couldn’t do a better job than she is doing to hurt President Trump’s chances of winning re-election. Enough.”

Republican senator Lindsey Graham told a reporter for HuffPost that her history “is just really toxic”. Even Republican Marjorie Taylor Greene, a committed acolyte of Trump and his Make America Great Again movement, and herself a purveyor of conspiracy theories and falsehoods, called Loomer’s comment about Harris “appalling and extremely racist,” adding, “This type of behaviour should not be tolerated ever.”

Trump, who has praised Loomer over the years, tried on Friday to duck from the criticism about her. He first claimed that he didn’t really know what she has said. Later he posted on Truth Social that he disagrees with the statements she has made, a classic dodge on his part.

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He went on to suggest that she is justified because she is “tired of watching the Radical Left Marxists and Fascists violently attack and smear me.” Apparently, no one can be too extreme if they support him – or at least they can be forgiven.

This has been Trump’s pattern from the time he first became a candidate nine years ago. If anything, he has become even less disciplined and more conspiratorial than he was back then. Few people likely to vote this November do not already have an opinion about him, pro or con. Because the country is so closely divided and questions about Harris exist, he remains in a position to possibly win the election.