Political enemies? No. Political rivals? Most definitely. At the end of the day, Cruz wants the nomination. Right now his biggest competition is Trump and Walker, people taking conservative votes away from him. He has to take both of them out early so he can build strength to finish off Bush. So why is Cruz meeting with Trump and defending Trump? As Winston Churchill said, "When you have to kill a man it costs nothing to be polite."
Cruz will not be slicing up Trump in the debate, count on it.
I think Cruz will be content with letting Trump shoot himself in the foot over time while RubioChristieBush highlight Trump’s more leftist history and Cruz expressing Trump’s better positions more elequently. Ted is in perfect position for these early debates. He won’t be the RINO target and the RINO contingent will be hit and Ted won’t have much blood on his hands.