Now, see, here is what keeps me awake.

Ted Cruz and Donald Trump-and-Co. knew exactly what Cruz was going to speechify/say, and how he was going to say it, for days in advance.
As Bob Schieffer reported for CBS, the speech was circulating in advance; he says he saw a copy himself, and anyone else who cared to take a look, saw the same thing.
The whole gesture was prepared in advance and deliberately allowed to take place.

You only had the public who behaved as though they had no clue whatever. They didn't care if the entire world saw them, on camera, jerking on the marionette strings in the puppetteers' hands.