Are non-white voters really moving away from the Democratic Party? To partisan Democrats confronting this question on Twitter (sorry, X), it seems preposterous that the party of Donald Trump, whom they routinely call a racist, could be gaining support from blacks, Hispanics, and Asians. But the evidence for eroding non-white support for Democrats is strong. The New York Times’s analyst Nate Cohn, who back in June 2016 was the first to identify Donald Trump’s appeal to previously Democratic-voting white non-college graduates, noted earlier this month that Joe Biden was carrying just 53% of non-whites in 2022-23 New York Times/Siena College...