 Throughout this four-day convention, delegates will be hearing from GOP officials, lawmakers, and candidates, plus a variety of other guests. They include TV host Tucker Carlson, Teamsters President Sean O'Brien, Dana White of Ultimate Fighting Championship, and evangelist Franklin Graham. Trump's biggest Republican primary rival originally was not going to see the convention stage, but former Governor Nikki Haley is now scheduled to speak here. Greg Clugston, Milwaukee.