Cruz should very nicely respond something like this:
I like Donald Trump. I wish every American businessman were as successful as Donald Trump. We agree on many issues, disagree on a few. I am not going to attack him and get in a fight with him or any other republican candidate.
But Donald criticizes me for being unable to make deals. Well, it’s just this kind of deal making that got us in trouble. We don’t need deal-makers like McConnell, Boehner, and Ryan; we need someone with a proven record of standing up for the principles and values of the American people and the Constitution.
Cruz should very nicely respond something like this:
Cruz should stay out of behind closed doors donors meetings if he is going to say something and then deny and dodge afterwards. Be a man and own it.