He did apologize for some of it...
But not good enough, right?
It was for Carson....
Initially he was much calmer about accepting the apology, taking Cruz word that he did not know what the Precinct leaders were doing, but would not have approved, had he known.
Later, as more information became known, he lamented over the dirty tricks typical in Washington Politics, which is why Trump, who is not Old School Washington politics, is also so mad...IMO.