As for Repubs, usually Kasich's numbers decline closer to the primary, but Kasich seems to be seriously contesting IN. Also, he fits very well the the Greg Ballard/Mitch Daniels Hoosiers, and also Kasich knows how to campaign in the midwest. But alas, Trump is Trump, and if Kasich's numbers go up, Trump will win the state.
Kasich had much more institutional support in Wisconsin (including two ex-Governors, Tommy Thompson and Scott McCallum). It didn't help. (Not that he'll do worse here than in Wisconsin, but I don't him to do much better, and I doubt he'll hit 22).