It is likely that Trump enters the convention with more than enough first ballot votes for nomination. If he wins Florida or Ohio he will slug it out. If he wins both, it is over. Expect a vast push in Ohio and Florida for him and then he will roll through the East Coast all but untouched.
Until now everything was proportional. It is now big winner take all states.
I read Kasich got $200,000 from Soros...helps keep Trump down