Here’s where the inroads must be made for 2016:
Obama got 93% of the Black vote in 2012. He got 73% of the Asian vote, 71% of the Latino vote, and 70% of the Jewish vote
Together, those groups were 30% of the total electorate.
About the only issue the Republicans have is the decline in income of the middle class of ~ 8%, where the perceived solution is bolstering small business. I think Hilary as former Secretary of State neutralizes foreign policy issues.
How this narrative can strip significant Black-Asian-Latino-Jew voters, I don't know. Some yes, enough, probably not.