I think you have it about right. In the final two weeks before Iowa, he re-allied himself with the Washington establishment figures and trashed the most bold conservative in Washington. A guy conservatives have rallied around. Going on offense against Cruz is expected. The vitriol of nastiness and the attacks matching the left/GOPe was enough to change the entire story about Trump. He proved for the moment he is not one of us, but rather one of them. He’s still in position to make a run, but if he had taken a different course in the final weeks, he could have won and been nearly inevitable.
That.