This is presuming Trump wins the nomination.
That is not a sure thing yet.
I believe if he wins both Florida and Ohio, it becomes much more of a sure thing.
But if Rubio wins Florida (less likely) and Kasich wins Ohio (more likely than a Rubio win) then with Cruz racking up a large number of other wins, they may end up denying Trump an outright win before the convention.
In such a scenario, Trump still has a good outlook. He will most assuredly win New York. On that track, it may come down to California.
But, should Trump win both Florida and Ohio...I think that although Cruz can stay in and make a decent run at it...it will pretty much be over in terms of Trump winning the GOP nomination.
We shall see.
If Trump wins Florida ( which he should ) and Ohio, plus a few others here and there, then N.Y. gets him over the 1237 on April 19th.; end of story !