The media will go after Trump but I think that is in his wheelhouse. If Cruz really has the grit he better rub out Rubio while he has the chance.
Rubio has the major fault of the Gang of 8 bill. Trump is a donald come lately to practically anything conservative. Some of us are not going to be dazzled by the lion tamer, the elephants, the bearded lady and the dancing bears. We want SUBSTANCE and that is not what the Manhattan zillionaire has to offer.
Cruz is doing quite nicely choosing his own strategy. Ask Iowans. If Rubio becomes a "solid second," that probably means that The Donald will have become a fading third.