http://www.reuters.com/article/us-usa-election-poll-idUSKCN0YP2EX
However, if the Reuters poll showed it a tie in mid May, and found Hillary double digits ahead now -- something is wrong with their poll. (The one in mid May, the one now, or both. IIRC Reuters was the first one to show Trump and Clinton essentially tied and I blew it off at the time.)
BTW, THIS is "Reuters Polling Explorer" methodology: http://thomsonreuters.com/en/articles/2013/new-interactive-tool-launched-reuters-polling-explorer.html:
"Instead of using telephones to gather results on a semi-regular basis, we partnered with the research firm Ipsos and opted to reach a huge number of mostly pre-screened respondents online. The result is that we have not only polled far more people than a traditional telephone survey can reach, but we've been polling continuously for more than a year and a half, asking hundreds of questions of about 11,000 people every month."
Caveat emptor. I'm not sure what this poll shows, or doesn't show.