After last night, I think there are 2 things that Trump should do. First, he needs to repeatedly call for Cruz to get out of the race since mathematically he cannot win. Over and over and over. Second, he should have Ivanka cut an ad with him calling out Cruz for his disgusting attacks on Melania and run the ad everywhere. Cruz likes to paint everything with a broad brush so turnabout is fair play. It would destroy Cruz with Republican women and garner Trump at least grudging admiration from independent women and possible some democrats.
DT doesn’t need to be told to say anything over and over since that is all he does (if it’s about himself or his polls) so have no worries about that. As for the wife ad, Cruz should have denounced it but it wasn’t approved by him nor created by his team.