Even so, he said he could not bring himself to support staying in the union and chose not to vote, because the issue of immigration held him back. “At the end of the day, we’re an island,” he explained. “We can take only so much population.”

One of the looming questions after the “Brexit” vote is what happens to the money flowing into places like Wales. Nearly $400 million in multiyear apprenticeship funding programs alone are underway, among a 60-page list of European projects earmarked for Wales stretching to 2020. Another program, with a budget of more than $180 million, helps start new small businesses and finance existing ones. Others fund a range of programs including advancing women’s opportunities and projects on college campuses.

Even so, 56 percent of voters in Newport voted to leave. One of the Leave movement’s core arguments was that Britain could keep money it now pays to Europe and use it for its own purposes.

Boris Johnson, the former London mayor who was one of the campaign’s most visible leaders, even rode around on a bus with the false claim that Britain pays Europe £350 million a week painted on its side. (It’s more like £150 million, or about $197 million, a week, according to the Institute for Fiscal Studies.) The maneuver led the comedian John Oliver to refer to Mr. Johnson as “a man with both the look, and the economic insight, of Bamm-Bamm from the Flintstones.”