Ron Brownstein: “The irony in President Donald Trump’s hostility to immigration, expressed again in reports of his vulgar comments about Africa and Haiti last week, is that in appealing to the racial and cultural resentments of his political base he is directly threatening their economic interests.”

“The equation is unmistakable: as America ages, the older and blue-collar whites at the core of Trump’s electoral coalition in 2016 need more working-age immigrants to pay the taxes that fund Social Security and Medicare.”

“Without robust immigration, each American worker will need to support substantially more retirees in the future than workers do today. And that will greatly increase the pressure for either unsustainable tax increases or biting benefit reductions in the federal retirement programs that the older and blue-collar whites central to Trump’s support rely upon so heavily.”