http://www.bloomberg.com/politics/ar.../national-poll
Bloomberg poll has Clinton up 9 whether two-way or four-way races. Even worse for Trump is that in the two-way race for the first time in the poll Clinton is winning:
Male voters
voters without a college degree
white females
AND she still maintains a huge lead in female voters overall.
Clinton winning 93% of those that lean democrat, Trump only 85% that lean republican. Independents are split 39-38 with clearly a bunch undecided (but I don't think at this stage you are going to see a big break for Trump over Clinton).