In his most recent column, the Washington Post’s Dan Balz summarizes data from the demographer William Frey, author of Diversity Explosion. According to Mr. Frey, “the United States is in the midst of a pivotal period ushering in extraordinary shifts in the nation’s racial demographic makeup.”

Among the highlights found in Mr. Balz’s column:

  • We’re witnessing the rapid growth among Hispanics, Asians, and multiracial populations. All are expected to double in size over the next 40 years. We’re also seeing declining growth rates and rapid aging of the white population, the result of both lower birth rates among younger white Americans and the advancing age of the Baby Boom generation.
  • We’re seeing the continued growth of the black middle class and the migration among black Americans from North to South, reversing the historic South-to-North wave of migration in the 20th century.
  • By later in this century, there will be no majority demographic group in the United States.

As for politics:

  • In 2012, for every 10 votes Mitt Romney won, nine came from white voters. Barack Obama won eight out of every 10 votes cast by a minority voter.
  • In 2008 and 2012, minority voters provided the key to victory for Mr. Obama in seven states: Ohio, Pennsylvania, Florida, Nevada, New Mexico, Virginia, and Colorado. It was also decisive in Indiana in 2008 and Wisconsin in 2012.
  • Changing demographics have afforded Democrats opportunities to compete in states that once were reliably Republican. That’s already happened in Colorado, New Mexico, and Nevada. Democrats may also become more competitive presidentially in states like Arizona (because of the Hispanic population) and Georgia (because of the growing African American population).
  • Mr. Frey points to six northern states—Ohio, Pennsylvania, Wisconsin, Michigan, Minnesota, and Iowa—whose demographic makeup may be better for Republicans. Their populations are older and whiter than those in the newer battlegrounds of the Sun Belt, and their electorates are composed of more white, blue-collar voters. Nevertheless, Pennsylvania, Michigan, Wisconsin, and Minnesota have been reliably Democratic in recent presidential elections (Ohio and Iowa have been more competitive).

It’s certainly true that Republicans have done extremely well–historically well–in the last two midterm elections. The GOP is now the governing party in America, if you take into account the political composition of the Senate, the House, governorships, and state legislatures. It may also be true that Barack Obama is sui generis; his appeal to rising demographics may not translate to other Democrats nearly as well as it did for him. Still, Republicans are kidding themselves if they don’t acknowledge that changing demographics are working to the disadvantage of Republicans. As William Frey told Balz, “In the longer term, [Republicans] absolutely have to be much more open to minorities and make a much more serious attempt to deal with Hispanics.”

Exactly how to do this remains an open question. But that it needs to be done is undeniable, at least if the GOP hopes to win on the presidential level on a consistent basis.