The GOP's convention rules are based on a modified version of the same rules used to run the House of Representatives. (In fact, traditionally the speaker of the House runs the convention, as will be the case this year.) Just as in every new session of the House, the first order of business at a GOP convention, after the call to order, is to pass a rules package. Spicer compared it to a condo board or neighborhood association meeting, where people need to know the process and how the meeting will run before they start voting on new business.http://www.usnews.com/news/the-report/articles/2016-03-25/the-first-rule-of-the-republican-national-convention-there-arent-any-rules-yet
Ted Cruz will not be the nominee.
Then hillary wins the general.
Trump has no way to win the general. His negatives are so great and his inability to think before speaking will make it impossible for him to undo his terrible numbers with women and conservatives. Sen. Cruz is experienced and smart enough not to be manipulated by the media into saying stupid things, or insulting groups he will need as allies in order to win.