From what I saw on CNN he won with evengelicals.
https://www.facebook.com/FRCAction/
They barely showed the poll - it was pretty close in Indiana - of regular church-goers it was 47% Cruz, 43% Trump. But the guy talking (Tony Perkins, Family Research Council) had some interesting comments on supporting Trump or not. I think this recent pick by Mr. Trump will help in winning some more support.