■ Her share of the vote among white voters without a college degree increased by five points, to 22 percent from 17 percent.

It puts her just slightly behind President Obama four years ago, and brings her support closer to the performance of down-ballot Democrats, who outpaced her by a much larger margin among these voters a month ago.

■ She gained three points among white voters with a degree, and now holds 42 percent of the white college-educated vote, to Mr. Trump’s 40 percent.

Mr. Trump’s weakness among these voters is the main reason he’s underperforming Mr. Romney, who won white voters with a degree by more than 20 points.

These well-educated voters have let Mrs. Clinton open up a huge lead in the state’s growing, well-educated suburbs. She had a 38-point lead in both the Raleigh-Durham-Chapel Hill area and in Mecklenburg County, home to Charlotte: 61 percent to 23 percent. Mr. Obama won those counties by 23 points, 61-38.