From "Begrudging WaPo poll: Trump 46%, Clinton 44%."
Here's the underlying WaPo piece, which is by Dan Balz and Scott Clement. Sample paragraph:
Among registered voters, Clinton runs away from Trump on such attributes as having the right experience to be president, having the personality and temperament to serve in the Oval Office and having realistic policy proposals. Trump’s strongest calling card is as a change agent. The two are judged more or less evenly on honesty and trustworthiness, on strength of leadership and on keeping the country safe.