I know a +15 for Hillary can be hard to grasp, but think about it this way.
-Higher than normal Latino turnout (see Arizona and Texas)
-Record breaking lopsided support from Latinos against Trump for Hillary (projected to be between 76.5% to 87.5% for HRC)
-A possibility of record breaking lopsided support from Millennials (keep in mind that Trump is doing very terrible among this group at less than <30%, third partiers either don't vote or will vote for Clinton so it's possible that she will pass 2012 and maybe even 2008)
-Black turnout is still strong unlike what others want to believe
-College educated whites rejecting Trump
-White women propelling toward Clinton
-Early voting shows high turnout period
A double digit lead for HRC on November 8, 2016 is not out of the question.
And importantly, a 15 point win relies on Republican turnout cratering, which we're seeing some tentative evidence of.