Let's be clear about something: contrary to what a bunch of ill-informed Trump supporting idiots are saying on Twitter, Cruz's speech - including the absence of an explicit endorsement of Trump - was pre-cleared by both the RNC and Trump. his speech, including the non-endorsement of Trump, was not a surprise to the RNC or Trump in any way. Even Donald Trump himself admitted this on Twitter, and for once Trump's twitter is not full of crap. I began to hear reports in the afternoon that Cruz told the RNC that he would not endorse Trump, and that the RNC was exerting a lot of pressure on him to change his mind, but that he firmly told them that he would not. He said he would congratulate Donald Trump, would avoid saying anything negative about Trump, and talk about the principles he stood for. The RNC and Trump both agreed to let him proceed with the speech as is. So the idea that Cruz sprung this on them as some sort of surprise is absolute BS.
Another piece of BS that has been circulated by the RNC to throw dirt on Ted Cruz is that he gave different remarks on stage than the prepared ones he submitted to the RNC for review. Unfortunately, the RNC screwed themselves on this score by sending to media organization prepared copies of Ted Cruz remarks which show that Cruz said exactly what his prepared remarks indicated.
In fact, in response to the news that Cruz was going to make a speech that did not explicitly endorse him, Trump intentionally chose to escalate the situation by leaking the news to friendly delegations and instructing them to boo Cruz to make this a bigger deal that it otherwise would have been. If Trump's delegates had not booed and caused a ruckus, but instead had remained silent or applauded at Cruz's exhortation to vote for down ticket races, everyone today would be talking about Pence and his speech, and the discussion would be about positive things associated with Trump and Pence and how they are going to move forward after the convention to at least possible victory.