Note: These polls were taken before Joe Biden announced he would not run. In these polls Joe averaged 16.8%. Poll questions indicate that Clinton will benefit more from Joe's announcement than Sanders so the differential between the two candidates is likely to grow on future polls.
Polls Taken between 10/4 - 10/18,
Clinton - 47.8%
Sanders - 25.7%
Differential - Clinton +22.1%
Link:
http://www.realclearpolitics.com/epolls/2016/president/us/2016_democratic_presidential_nomination-3824.html
