His support was just to deny Trump 66 delegates. Now that Kasich is no longer needed he is off to the last remaining hope. At least he has his millions to console him when that plan fail, because it wasn’t Romney that helped win Ohio for Kasich. That honor goes to the Republican political machine in Ohio.
The purpose of this ad is to deny Cruz a 50% share of the vote in Utah.
If Cruz gets 50%, then Utah is WTA delegates. Cruz gets them all.
Cruz will win Utah, no doubt. The critical question is "Can he exceed 50%?"