BTW there is no difference in the context of a Republican primary. Carter prefers Trump which is why he spoke out. That’s the definition of endorsement vis a vis a Republican primary. But more than that it is a tortured attempt to paint Cruz as a liar based on what the meaning of is is. Yes, Clintonian.
Public enemy number one for Democrats is whatever Republican they think will beat them. It's the candidate they fear the most. They hate Ted Cruz, but he may not be the one they fear the most.