“I’ll tell you what’s the big problem there: Trump does not believe in limited government. It’s not in his universe, and that’s why the Tea Party exists.”
Agreed as to why Cruz supporters have a problem with Trump. That said. The debate with Bernie is a good idea as long as he can clearly show how he and Bernie are different. And, if nothing else, since he has never had a one on one debate, it will be good practice for when he has to de ate Hillary.