Without stuffing millions of votes into a non-contiguous, 3 EV, District of Columbia, this is almost certainly the best Trump can do (I tried fiddling at the margins to see if Huntington-Hill could get NYC down to 11, but no doing.
ProbablyCertainly you could merge HI into CA and get Clinton down to 15, but I preferred not to).
LinkClinton: NYC (exc Staten Island) (12) + HI (4) + DC (3)
Trump: CA-TX-GA 171
FL 25
IL 48
MI 15
TN-OH-NY-New England 111
NC 13
Long Island 6
VA 10
AK 3
39 rectangles between ND and TX, 3 votes each