From the 0ptimus Poll (really a Trump worse case — he polled 49, 51 when undecideds were pushed).
They were very pro-Kasich in WI. There’s rumors that it was a coordinated internal.
Here are the CDs where Trump was under 50 in that poll.
Pro-Kasich CD 7 (Brooklyn), CD 12 (Manhattan. Queens), CD 13 (Manhattan, Bronx), CD 15 (South Bronx), CD 16 (North Bronx/Southern Westchester), CD 19 (Hudson Valley), CD 20 (Albany), CD 21 (Watertown, Plattsburgh, Adirondacks), CD 22 (Rome, Utica, Southern Tier), CD 23 (SW NY, Ithaca, Corning, Fredonia), CD 24 (Syracuse), CD 25 (Rochester), CD 26 (Buffalo), CD 27 (Buffalo Suburbs)
Pro-Cruz CD 9 (Brooklyn) CD 10 (Brooklyn/Manhattan)
The reason I cite that poll is that it was the only one that had enough people in most of the 27 CDs to have each poll be statistically significant.
Some of the CDs with very few Republicans in them like CD-15 (D+43) were not as reliable.