Trump can’t get to 1237 if he loses IN, much less all those other ones.
That’s just a fact.
Also...Chances are Cruz will win a bunch in CA.
Indiana is important no doubt about it, but it’s after the NE states where Cruz will take a serious shellacking and any momentum from WI will be a distant memory.
So chances are good for Trump in IN, and he will get some from the other states other than NE.