Why Trump is close: He’s winning voters who see little difference between him and Clinton

Part of the reason is that people who consider Trump and Clinton on equal terms on these things tend to favor Trump by a large — and even increasing — margin.

While 57 percent of registered voters view Clinton as being qualified to serve as president, just 43 percent say the same of Trump.

But 1 in 5 registered voters view Trump and Clinton on equal terms when it comes to whether they are qualified to serve as president — either because both are qualified, or because neither is — and among this group, Trump leads Clinton by 35 points, 48 percent to just 13 percent.

Among this group, in fact, Libertarian Gary Johnson actually has a statistically insignificant edge on Clinton. He takes 16 percent of these voters.