What’s the matter with Iowa, a once-blue state that voted for Trump last year? The New York Times thinks it has the answer:

There is little to suggest a future for the party here in this once reliable Democratic stronghold, at least in races on the national level. President Trump easily carried this county in the 2016 election, and Iowa as a whole; the only counties Hillary Clinton won were in metropolitan areas or university towns.

Iowa’s dramatic change has been both abrupt and a long time in coming. In 2008, the state propelled Mr. Obama to the White House. A year later, it was the first in the Midwest to legalize same-sex marriage. But last November, Mr. Trump won Iowa by a larger margin than he won Texas. And now Republicans control the governor’s office, the Legislature, both Senate seats and three of four in the House.

“Is Iowa still a swing state?” said J. Ann Selzer, who has conducted polling here for 30 years and was almost alone in forecasting the size of Mr. Trump’s victory. She took a moment to answer and seemed skeptical. “You know, potentially. Pundits will probably treat it that way for another cycle.”