Other than Cruz, have other candidates commented in public about this?
Not that I know of. Cruz's reaction is to taunt Trump for "ducking" confrontation. Would be an interesting one-on-one, but I think Trump gets more mileage by taunting back.
Yes Cruz is out there screaming that Trump is scared blah, blah, blah, and John Ellis chimed in with Trump is not a Christian. Its kiddie chaos. What a joke.
Trump does not need Fox News at all. He’s done 6 debates he has nothing else to prove. Tomorrow night is being set up as an ambush to try to bring Trump down so he loses the Iowa Caucus. Let Cruz face Megyn and see how he likes it. She will turn on him without Trump as a shield.