The divide — or, more aptly, the crater — between pro-Trump and anti-Trump evangelicals is a window into the future of the Republican Party. White evangelical voters are the heart of the party’s base, the loyal foot soldiers who turn out for the party’s presidential nominee every time. A poll by the Public Religion Research Institute taken in part after the video’s release shows 65 percent of white evangelicals intending to vote for Mr. Trump. That is high enough to be significant, but is relatively low for evangelical voters and the Republican nominee. (For comparison, Mitt Romney, who was viewed with suspicion by many evangelicals because he is Mormon, won the votes of 79 percent of white evangelicals.) Most telling, though, is the significant gender gap: while 72 percent of white evangelical men said they intend to vote for Mr. Trump, only 58 percent of white evangelical women did.