Cruz is a politician; he knows campaigns get ugly. If he’s such a delicate doily then he should’ve not entered the race.
And... why is it OK for Cruz to trash Trump, but not OK for Trump to respond? That door swings both ways, Baby.
Of course he knows campaigns get ugly. As I said, he obviously never got over below-the-belt attacks on his wife and father. Those were attacks that Trump should’ve avoided in the first place, totally unnecessary.