My prediction:
Kasich wins: Connecticut Delaware Maryland Rhode Island
Trump wins: Pennsylvania (if Kasich isn't on the ballot)
Trump sweeps.
1) Half of Connecticut is an extension of New York. Trump wins there handily.
2) Trump took Mass with 50% of the vote. There's no reason to think he wouldn't do the same in RI.
3) Delaware will fall in line with RI and CT.
4) Kasich ran terribly in counties bordering Western Pennsylvania. Trump's name recognition will push him over the top in the NYC exurbs and Philadelphia.
5) Maryland is Kasich's best chance thanks to government workers living in the DC/Baltimore areas. But the northern part of the state resembles PA and there's a good military presence in Annapolis.
Most of them are registered Democrats. Maryland is a closed primary.