Trump gave Cruz a chance at redemption, a choice. Cruz chose poorly. Trump could have told him he was off.... but in fact gave Cruz free will as he may have changed his mind at the presentation. However, he didn’t.
Also to note, what does this say about Trump’s leadership and confidence? Trump willingly allowed a person to give a speech that would be against him. I’d like to think this was because Trump was confident enough that he knew the people would side with him and put the final nail in Cruz’ coffin.
Trump willingly allowed a person to give a speech that would be against him.