There’s a reason why Cruz refrains from the strategy being followed by Gov. Jindal and all the other candidates attacking Trump. He’s far smarter than them. Cruz recognizes that no one’s going to persuade primary voters by attacking other candidates and any “good boy!’s” they might earn from the media are a kiss of death in this environment. Trump isn’t the enemy ... Obama, the Democrats, and the Republican congressional “leadership” are.
Trump can and does attack - or counter punch when others come after him,. It would be totally out of character for Cruz and phony if he did so. This will just roll off his back. Notice how the media immediately goes to the Cruz campaign for an answer hoping to get a sound bite they can plaster all over the news cycle for the next week or so? They love to hear Republicans fighting with each other.