He will not beat Kasich big in Ohio. It’s a pure winner take all state, so a win is a win, and a loss is a total loss.
I agree that a big Trump win in Ohio is very unlikely.
I’m a Cruz fan and am a little worried that Cruz will pull enough Trump votes to make it close or even give us a Kasich upset win. I’m normally for Cruz and I wish him well but in Ohio even Cruz knows he needs a Trump win.