Sabrina Tavernise, New York Times, June 20, 2018

Deaths now outnumber births among white people in more than half the states in the country, demographers have found, signaling what could be a faster-than-expected transition to a future in which whites are no longer a majority of the American population.

The Census Bureau has projected that whites could drop below 50 percent of the population around 2045, a relatively slow-moving change that has been years in the making. But a new report this week found that whites are dying faster than they are being born now in 26 states, up from 17 just two years earlier, and demographers say that shift might come even sooner.

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The change has broad implications for identity and for the country’s political and economic life, transforming a mostly white baby boomer society into a multiethnic and racial patchwork. A majority of the youngest Americans are already nonwhite and look less like older generations than at any point in modern American history. In California, 52 percent of all children are living in homes with at least one immigrant parent, Professor Sáenz said.

What does it mean for the political map? Some experts say that rapid demographic change became a potent issue in the 2016 presidential race — and helped drive white voters to support Donald J. Trump.

Of the 26 states where deaths now exceed births for whites, 13 voted for Mr. Trump and 13 voted for Hillary Clinton. Four are states that flipped from President Barack Obama in 2012 to Mr. Trump in 2016 — Ohio, Michigan, Pennsylvania and Florida. But it is not clear how demographic change will affect politics in the future.

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Florida was the first state where white deaths outstripped births around 1993, largely because it was drawing a lot of retirees. But its population has been one of the fastest growing in the nation. Retirees have kept coming, replenishing the white population, and its large Hispanic population has helped lift the state over all. The median age for Hispanics in the United States is 29, prime for child bearing, compared with 43 for whites.

Deaths began to exceed births for whites countrywide in 2016, according to the report. But in many states, as in Florida, white people moving in made up the losses. However, in 17 states, including California, Michigan, New Jersey and Ohio, those migrants weren’t enough and the white populations declined between 2015 and 2016, said Kenneth M. Johnson, a demographer at the University of New Hampshire and the report’s other author. Five of those states registered drops in their total populations that year: Vermont, West Virginia, Pennsylvania, Mississippi and Connecticut.

The aging of the white population began in rural counties long before it ever took hold in an entire state. Martin County, a bear-shaped patch of eastern North Carolina, first experienced it in the late 1970s. In recent years, deaths have exceed births among its black population, too.

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Fewer young families means fewer children. Christopher Mansfield, the county’s superintendent of schools, said the county has lost about 40 percent of its school-age population since the late 1990s. In those days, the county had 12 public schools, he said. Soon it will have eight.

The county now has what Dr. Mansfield calls “bookend” demographics, with a large population bulge over the age of 50 and another one under the age of 19. The prime working-age population is small in comparison.

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Despite demographic change, whites — and in particular less educated whites — will still make up the bulk of eligible voters in the country for a while. Whites without a bachelor’s degree will make up 44 percent of eligible voters in 2020, said Ruy Teixeira, a political scientist who did a broad study of demography and politics this spring. College-educated whites will be about 23 percent. Mr. Teixeira said Republicans could continue to win presidential elections and lose the popular vote through 2036 if they did even better among whites who had not graduated from college, while other voting patterns held steady.

That is giving politicians incentives to emphasize issues, like immigration and race, where there are the biggest differences in views by education. A class divide has been growing for years among whites. In 1988, there was no difference between whites with a college degree and those without, Mr. Teixeira said. Both voted for George Bush over Michael Dukakis by a 20-point margin. By 2016, Mrs. Clinton lost noncollege whites by 31 points, double Mr. Obama’s 2012 loss, while carrying college-educated whites by seven points.

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Some experts argue that the transition to a white minority might be much further off than the numbers suggest. The Census Bureau counts any person who is of mixed race or ethnicity as nonwhite, and experts say this can underestimate whites in the population. For example, the child of a white mother and Hispanic father would be counted as Hispanic, even though research shows that many such mixed children — about 11 percent of all births, according to Richard Alba, a sociologist at the City University of New York — are not unlike white children in terms of residence, family income, schooling and eventually, marriage.

“The Census Bureau is trying to apply a 20th-century conception of race and ethnicity on a situation that’s fundamentally changing,” Professor Alba said. The rapid rise of racial and ethnic mixing has led to a generation of young people whose identities are fluid, but who often “lean white,” he said. “You could think of them as kind of integrating into a kind of white mainstream.”

[Edtior’s Note: The report on which this story is based — along with charts and tables — is available here.]