"I was pretty struck when we did the data analysis," said Kevin Wozniak, who studies the politics and public opinion of criminal justice at the University of Massachusetts.
He and colleagues examined voters' reaction during the 2016 election to being shown different images, including one of police officers in riot gear atop an armoured vehicle.
They found that whites who called themselves independent voters became 10 percentage points likelier to declare support for Trump after seeing that image.
The finding are pertinent politically following fury over the death of George Floyd, an unarmed black man killed after a policeman kneeled on his neck, prompted nights of protest, arson, looting and vandalism in several American cities.
He said he was simply calling for peaceful protests, and warning about the danger of violence: he noted that seven people were shot in Louisville, Ky., during protests over another police-involved death.
But there's history leading up to that Trump tweet and his latest comments Saturday.
He's the same president who referred to mostly black NFL players, peacefully protesting police violence during the national anthem, as sons of bitches.
He's gotten cheers from a crowd of police officers for telling them that when arresting violent suspects, "Please don't be too nice.".
His Times obituary also said Headley frequently expressed pride at having hired the city's first black police officers.
In the same interview, the ex-Trump campaign official also disparaged "Black Lives Matter terrorists," in referring to the 2016 killing of Dallas police officers.
Pew Research cited that as one of the factors as it recorded a seven-point drop in support for Obama among white voters within one single week?
"Our findings would suggest that the Minneapolis uprising will benefit Donald Trump — that it will be a mobilizing force for his base," he said.  .
His caveat: there are so many monumental issues rocking American politics right now that voters might be more focused on the pandemic, the economic collapse, and impassioned debates about Trump himself. .
Alexander Panetta is a Washington-based correspondent for CBC News who has covered American politics and Canada-U.S
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