These questions reveal two overlooked aspects of the Trump electorate.
Yes, white voters without a college degree shifted decisively from Barack Obama to Donald J. Trump in 2016. But these voters actually made up only a slightly larger share of Mr. Trump’s coalition than they did of the previous three Republican nominees’ coalitions.
And while Mr. Trump has a large and resilient base of supporters, a sizable share had reservations when they cast their ballots for him and continue to have reservations about him today. A small but meaningful number of his voters, particularly women, appear to have soured on him since the election.
Understanding the breadth of Mr. Trump’s coalition is important to understanding the Republican Party’s position heading into the 2018 midterms. Mr. Trump’s most enthusiastic supporters were vital to his victory in the primary, and Obama-Trump voters in old industrial towns were decisive in the general election. But the midterms could be decided by voters at the edge of Mr. Trump’s coalition and of the public’s imagination: stereotype-defying female, college-educated or nonwhite Trump supporters, who are somewhat likelier to harbor reservations about the president. They may have been reluctant to back him, but they were still essential to his 2016 victory and are essential to the G.O.P.’s chances today.