Cruz's PAC started the first attack on Trump's wife. Pappy Cruz brought Trump's comments on by his own verbiage. If Cruz doesn't like the flak then he needs to get his PAC and his father under control. But really, Cruz should have dropped out when he got mathematically eliminated. Everything going forward from that moment is what he is begging for anyhow.
And, maybe Cruz isn't really angry. Maybe he's just faking.
As Trump looks at all this, he must/should be thinking, "For what reason will guys like Bush, Rubio, Kasich and Cruz want me to win in November? Is it possible that they will want me to lose?" Bush and Rubio still have some clout in Florida. Kasich is governor of Ohio. Those are important states. I think these guys could be helpful to Trump. The other side of that coin is that they could also be harmful to Trump. He should try to figure out a way to get them invested in his campaign, if that is still possible.