The really big story here is that Trump won every county in Pennsylvania, Maryland, and Delaware. Kasich won a couple of counties in CT and one in Rhode Island.
Trump must have a much better “ground game” than he is letting on, because winning every county in a state, especially one as large as Pennsylvania, is unheard of. Cruz won big in WI (his last real win) but the election map shows that he took the large cities and their surrounding counties, but Trump took the majority of the counties. That outcome is a natural one, not winning every county, and to do it in 3 out of 5 states borders on the unbelievable.
The reports of Dems switching to Republican played out in Trump's favor it seems.