You keep telling yourself Cruz is still relevant. Only makes your reaction in July all the more hilarious.
Cruz joins Kasich in mathematically elimination on April 26. From there, he will need to explain to the electorate why he's still running, tell them he's trying to force a contested convention, because that will be the only way he can hope to win at that point.
Ok then. Going by your advice, Sleazy tRump should withdraw in June when it becomes mathematically impossible for him to gwt to 1237. Given that Ted Cruz has absolutely no intention of withdrawing, that will make it even easier for Ted Cruz to win.