The poll shows big gaps along the lines of race, gender, age and education that have surfaced consistently during the campaign. Through Thursday’s results, Trump led among men, 47% to 36%, while Clinton had a smaller, 41%-34% edge among women. Trump led among voters 45 and older, Clinton among those younger.

Some of Trump’s strongest support comes from white voters who have not graduated from college, among whom he led 53% to 24%. Clinton, by contrast, dominates among minorities, leading 77% to 3% among blacks and 51% to 30% among Latinos.

Clinton also held a narrow edge among white college graduates, 42% to 40%. If she wins that group, Clinton would be the first Democrat to carry white college graduates since polls began asking such demographic questions in the early 1950s.

The poll also offers some support for a prediction that Trump’s backers have made – that he would appeal to disaffected voters who did not cast ballots in 2012. Those who did not vote that year or voted for a minor-party candidate were more likely to favor Trump than Clinton, the poll indicated.