Trump stirring the pot, good free publicity. He won’t follow through because he doesn’t need to. In fact he should really just STFU because he is only alienating Cruz supporters more.
Most people are on board with Trump. I think this is just him warning Cruz and Kasich plus those who are sniping at him from talk radio to shut the **ck up! He doesn’t need these petty idiots taking shots at him from the side when he’s going after Hillary.
The only good free publicity he gets is when he bashes Republicans. The media is strangely silent when he bashes Hillary.