The ex-president and Ms. Montgomery met at a Chick-fil-A restaurant during an impromptu campaign stop in Atlanta. Ms. Montgomery was effusive in her praise of President Trump, saying, "I don't care what the media tells you, President Trump—we support you!" A video of Ms. Montgomery and the former president hugging soon went viral, even as the media and Democrats quickly dismissed the interaction as "staged."

Then, last week, President Trump left his trial in Manhattan to visit a bodega in Washington Heights, a mostly black and immigrant community on the Upper West Side of Manhattan and received a hero's welcome from the working people there.

Whether the Chick-fil-A event was staged or not is open to debate. What is undeniable, though, is that polling shows Donald Trump has upended much of the black and Hispanic voting support Democrats have enjoyed since at least Lyndon Johnson's "Great Society" and, at least in some instances, back to FDR's New Deal.

A Wall Street Journal poll showed that President Trump's support among black men in swing states had moved to 30 percent earlier this month compared to just 11 percent of black men nationally in 2020. Among black women, those same percentages went from 6 percent in 2020 to 11 percent in April.

'It's the Economy, Stupid!'

Political pundits and editorial pages all seem flummoxed by President Joe Biden's erosion of support among the traditional Democrat coalition.

But no one seems more upset by the erosion of black support than Democrat political strategist James Carville, "the Ragin' Cajun," who engineered Bill Clinton's 1988 victory over incumbent George H.W. Bush. That's ironic, because it was Mr. Carville who added the memorable phrase "It's the economy, stupid!" to the American political lexicon when he pinpointed President Bush's greatest vulnerability 36 years ago.