Basically, he'll pursue the groups that voted for Romney and, thereafter, try to gain 5-6% with Hispanics, 2-3% with Blacks, and 2-3% with Asians.
He's not looking to win minorities; with them, he just needs to go from "really really bad" to just "really bad."
How the heck is Trump going to gain any percentage on Romney w/ Hispanics? He's going to lose them by a HISTORIC margin.
At this point, I assume that anyone voting for Trump is incredibly uneducated or doesn't care about anyone but themselves.